- 1000000000 (number)
List of numbers – Integers
100000000 1000000000 10000000000
Cardinal One billion (short scale)
One thousand million (long scale)
Ordinal One billionth (short scale) Factorization 29 · 59 Binary 111011100110101100101000000000 Hexadecimal 3B9ACA00
In scientific notation, it is written as 109.
In modern (short scale) English usage, it is usually called a billion (although in long scale usage in many other languages, a billion means 1,000,000,000,000 – a million millions). The unambiguous term is a thousand million, which has the same meaning in both scales.
The term milliard can also be used to refer to 1,000,000,000; this name very often appears in other languages, e.g. Norwegian; milliard Danish: milliard, Swedish: miljard, Hebrew:milliard.
Selected 10-digit numbers (1,000,000,000–9,999,999,999)
- 1023456789 – smallest pandigital number in base 10
- 1026753849 – smallest pandigital square that includes 0
- 1073676287 – 15th Carol number
- 1073741824 = 230
- 1073807359 – 14th Kynea number
- 1129760415 – 23rd Motzkin number
- 1134903170 – 45th Fibonacci number
- 1162261467 = 319
- 1220703125 = 513
- 1234567890 – pandigital number with the digits in order
- 1311738121 – 25th Pell number
- 1382958545 – 15th Bell number
- 1406818759 – 30th Wedderburn-Etherington number
- 1836311903 – 46th Fibonacci number
- 1882341361 – The least prime whose reversal is both square (403912) and triangular (triangular of 57121).
- 1977326743 = 711
- 2147483647 – 8th Mersenne prime and the largest signed 32-bit integer
- 2147483648 = 231
- 2214502422 – 6th primary pseudoperfect number
- 2357947691 = 119
- 2971215073 – 11th Fibonacci prime (47th Fibonacci number)
- 3166815962 – 26th Pell number
- 3192727797 – 24th Motzkin number
- 3323236238 – 31st Wedderburn-Etherington number
- 3405691582 – hexadecimal CAFEBABE; used as a placeholder in programming.
- 3405697037 – hexadecimal CAFED00D; used as a placeholder in programming.
- 3486784401 = 320
- 4294836223 – 16th Carol number
- 4294967291 – Largest prime 32-bit unsigned integer
- 4294967295 – Maximum 32-bit unsigned integer (hexadecimal FFFFFFFF)
- 4294967296 = 232
- 4294967297 – the first composite Fermat number
- 4295098367 – 15th Kynea number
- 4807526976 – 48th Fibonacci number
- 5784634181 – 13th alternating factorial
- 6103515625 - 514
- 6210001000 – only self-descriptive number in base 10
- 6227020800 = 13!
- 6983776800 – 15th colossally abundant number
- 7645370045 – 27th Pell number
- 7778742049 – 49th Fibonacci number
- 7862958391 – 32nd Wedderburn-Etherington number
- 8589869056 – 6th perfect number
- 8589934592 = 233
- 9043402501 – 25th Motzkin number
- 9814072356 – largest square pandigital number, largest pandigital pure power
- 9876543210 – largest pandigital number without redundant digits
Sense of scale
The facts below give a sense of how large 1,000,000,000 (109) is in the context of time according to current scientific evidence:
- 109 seconds is 114 days short of 32 calendar years (≈ 31.7 years).
- About 109 minutes ago, the Roman Empire was flourishing and Christianity was emerging. (109 minutes is roughly 1,900 years.)
- About 109 hours ago, modern human beings and their ancestors were living in the Stone Age (more precisely, the Middle Paleolithic). (109 hours is roughly 114,000 years.)
- About 109 days ago, Australopithecus, an ape-like creature related to an ancestor of modern humans, roamed the African savannas. (109 days is roughly 2.7 million years.)
- About 109 months ago, dinosaurs walked the Earth during the late Cretaceous. (109 months is roughly 82 million years.)
- About 109 years ago, the first multicellular eukaryotes appeared on Earth.
- The universe is currently thought to be about 13.7 × 109 years old.
In terms of distance:
- 109 inches is 15,783 miles (25,400 km), more than halfway around the world and sufficient to reach any point on the globe from any other point.
- 109 metres is almost three times the distance from the Earth to the Moon.
- 109 kilometres is over six times the distance from the Earth to the Sun.
In terms of finance:
- The possession of assets with total value of 109 United States dollars would place a person among the world's wealthiest individuals.
- As visualized in a work by artist Michael Marcovici, this amount of money in stacks of hundred-dollar bills can fit on twelve wrapped pallets.
In terms of area:
- A billion square inches would be a square about one half mile on a side.
- A piece of finely woven bed sheet cloth that contained a billion holes would measure about 500 square feet (46 m2), large enough to cover a moderate sized apartment.
In terms of volume:
- There are a billion cubic millimeters in a cubic meter.
- A billion grains of table salt or granulated sugar would occupy a volume of about two and a half cubic feet.
- A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.
In terms of natural landscape; a small mountain, slightly larger than Stone Mountain Georgia, United States, would weigh (have a mass of) a billion tons.
In terms of count:
A is a cube; B consists of 1000 cubes of type A. C consists of 1000 Bs; and D 1000 Cs. Thus there are 1 million As in C; and 1,000,000,000 As in D.
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