56105988 has 24 divisors (see below), whose sum is σ = 131702592. Its totient is φ = 18589344.

The previous prime is 56105977. The next prime is 56106007. The reversal of 56105988 is 88950165.

It is a super-2 number, since 2×56105988² = 6295763778912288, which contains 22 as substring.

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, 11995 + ... + 16002.

It is an arithmetic number, because the mean of its divisors is an integer number (5487608).

Almost surely, 2^56105988 is an apocalyptic number.

It is an amenable number.

56105988 is an abundant number, since it is smaller than the sum of its proper divisors (75596604).

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

56105988 is a wasteful number, since it uses less digits than its factorization.

56105988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28171 (or 28169 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 56105988 is about 7490.3930470971. The cubic root of 56105988 is about 382.8274508102.

The spelling of 56105988 in words is "fifty-six million, one hundred five thousand, nine hundred eighty-eight".