Number 40 - properties and curiosities

Forty

40 is an even number.

40 is a Harshad number, which means it is divisible by the sum of its digits (4 + 0 = 4, and 40 is divisible by 4).

In binary, 40 is represented as 101000.

In hex, 40 is represented as 28.

Prime factorization of 40: 2³ * 5.

Factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40.