140 (number)

← 139 141 → 140
← 140 141 142 143 144 145 146 147 148 149 → List of numbers — Integers ← 100 110 120 130 140 150 160 170 180 190 →
Cardinal	one hundred [and] forty
Ordinal	140th (one hundred [and] fortieth)
Factorization	$2^2 \cdot 5 \cdot 7$
Divisors	1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
Roman numeral	CXL
Binary	100011002
Octal	2148
Duodecimal	B812
Hexadecimal	8C16

140 (one hundred [and] forty) is the natural number following 139 and preceding 141.

In mathematics

140 is an abundant number and a harmonic divisor number. It is the sum of the squares of the first seven integers, which makes it a square pyramidal number, and in base 10 it is divisible by the sum of its digits, which makes it a Harshad number.

The sum of Euler's totient function φ(x) over the first twenty-one integers is 140. An odious number because it has an oddnumber of ones in its binary number.

In other fields

140 is also:

• The Twitter entry-character limit, a well-known characteristic of the service (based on the text messaging limit)
• A film, based on the Twitter entry-character limit, created and edited by Frank Kelly of Ireland^[1]
• The age that Job died at (Bible, Job 42:16)
• The atomic number of Unquadnilium, a temporary chemical element
• PRO 140 antibody found on T lymphocytes of the human immune system
• Telephone Directory assistance in Egypt

See also

• List of highways numbered 140
• United Nations Security Council Resolution 140
• United States Supreme Court cases, Volume 140

External links

• The Natural Number 140
• The Number 140 at The Database of Number Correlations

References

1. ^ Wired.com - June 23, 2009