56158728 has 32 divisors (see below), whose sum is σ = 142378560. Its totient is φ = 18455360.

The previous prime is 56158717. The next prime is 56158757. The reversal of 56158728 is 82785165.

It is a self number, because there is not a number n which added to its sum of digits gives 56158728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14775 + ... + 18182.

It is an arithmetic number, because the mean of its divisors is an integer number (4449330).

Almost surely, 2^56158728 is an apocalyptic number.

It is an amenable number.

56158728 is an abundant number, since it is smaller than the sum of its proper divisors (86219832).

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

56158728 is a wasteful number, since it uses less digits than its factorization.

56158728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33037 (or 33033 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 56158728 is about 7493.9127296760. The cubic root of 56158728 is about 382.9473666899.

The spelling of 56158728 in words is "fifty-six million, one hundred fifty-eight thousand, seven hundred twenty-eight".