 140 (number)

140 Cardinal one hundred [and] forty Ordinal 140th
(one hundred [and] fortieth)Factorization Divisors 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140 Roman numeral CXL Binary 10001100_{2} Octal 214_{8} Duodecimal B8_{12} Hexadecimal 8C_{16} 140 (one hundred [and] forty) is the natural number following 139 and preceding 141.
Contents
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 twentyone 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 entrycharacter limit, a wellknown characteristic of the service (based on the text messaging limit)
 A film, based on the Twitter entrycharacter 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
References
Categories: Integers
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