56831856 has 20 divisors (see below), whose sum is σ = 146815752. Its totient is φ = 18943936.

The previous prime is 56831849. The next prime is 56831981. The reversal of 56831856 is 65813865.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591951 + ... + 592046.

Almost surely, 2^56831856 is an apocalyptic number.

It is an amenable number.

56831856 is an abundant number, since it is smaller than the sum of its proper divisors (89983896).

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

56831856 is a wasteful number, since it uses less digits than its factorization.

56831856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184008 (or 1184002 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 56831856 is about 7538.6906024853. The cubic root of 56831856 is about 384.4713179735.

Subtracting 56831856 from its reverse (65813865), we obtain a square (8982009 = 2997²).

The spelling of 56831856 in words is "fifty-six million, eight hundred thirty-one thousand, eight hundred fifty-six".