56391012 has 48 divisors (see below), whose sum is σ = 153899200. Its totient is φ = 17807040.

The previous prime is 56391011. The next prime is 56391059. The reversal of 56391012 is 21019365.

56391012 is a `hidden beast` number, since 5 + 639 + 10 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (56391011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11689 + ... + 15792.

Almost surely, 2^56391012 is an apocalyptic number.

It is an amenable number.

56391012 is an abundant number, since it is smaller than the sum of its proper divisors (97508188).

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

56391012 is a wasteful number, since it uses less digits than its factorization.

56391012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27513 (or 27505 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 56391012 is about 7509.3949157039. The cubic root of 56391012 is about 383.4746233209.

The spelling of 56391012 in words is "fifty-six million, three hundred ninety-one thousand, twelve".