# 140 (number)

140 (number)
140
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

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:

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