56139912 has 32 divisors (see below), whose sum is σ = 155944800. Its totient is φ = 18713232.

The previous prime is 56139907. The next prime is 56139931. The reversal of 56139912 is 21993165.

56139912 is a `hidden beast` number, since 561 + 3 + 9 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129738 + ... + 130169.

It is an arithmetic number, because the mean of its divisors is an integer number (4873275).

Almost surely, 2^56139912 is an apocalyptic number.

It is an amenable number.

56139912 is an abundant number, since it is smaller than the sum of its proper divisors (99804888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56139912 is a wasteful number, since it uses less digits than its factorization.

56139912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259922 (or 259912 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 56139912 is about 7492.6572055580. The cubic root of 56139912 is about 382.9045930327.

The spelling of 56139912 in words is "fifty-six million, one hundred thirty-nine thousand, nine hundred twelve".