56728568 has 24 divisors (see below), whose sum is σ = 115180200. Its totient is φ = 26181792.

The previous prime is 56728531. The next prime is 56728579. The reversal of 56728568 is 86582765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19628 + ... + 22331.

It is an arithmetic number, because the mean of its divisors is an integer number (4799175).

Almost surely, 2^56728568 is an apocalyptic number.

It is an amenable number.

56728568 is an abundant number, since it is smaller than the sum of its proper divisors (58451632).

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

56728568 is a wasteful number, since it uses less digits than its factorization.

56728568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41991 (or 41974 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 56728568 is about 7531.8369605296. The cubic root of 56728568 is about 384.2382599780.

The spelling of 56728568 in words is "fifty-six million, seven hundred twenty-eight thousand, five hundred sixty-eight".