56638860 has 96 divisors (see below), whose sum is σ = 168333312. Its totient is φ = 14204160.

The previous prime is 56638859. The next prime is 56638871. The reversal of 56638860 is 6883665.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68409 + ... + 69231.

It is an arithmetic number, because the mean of its divisors is an integer number (1753472).

Almost surely, 2^56638860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56638860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84166656).

56638860 is an abundant number, since it is smaller than the sum of its proper divisors (111694452).

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

56638860 is a wasteful number, since it uses less digits than its factorization.

56638860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 56638860 is about 7525.8793506141. The cubic root of 56638860 is about 384.0356141014.

The spelling of 56638860 in words is "fifty-six million, six hundred thirty-eight thousand, eight hundred sixty".