140 (number)

← 139 140 141 →
← 140 141 142 143 144 145 146 147 148 149 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred forty
Ordinal	140th (one hundred fortieth)
Factorization	22× 5 × 7
Divisors	1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
Roman numeral	CXL
Binary	100011002
Ternary	120123
Quaternary	20304
Quinary	10305
Senary	3526
Octal	2148
Duodecimal	B812
Hexadecimal	8C16
Vigesimal	7020
Base 36	3W36

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

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.

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

140 is a repdigit in bases 13, 19, 27, 34, 69, and 139.

140 is also:

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