56645980 has 24 divisors (see below), whose sum is σ = 119125440. Its totient is φ = 22626240.

The previous prime is 56645977. The next prime is 56645999. The reversal of 56645980 is 8954665.

It is a nialpdrome in base 13.

It is a congruent number.

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, 16666 + ... + 19774.

It is an arithmetic number, because the mean of its divisors is an integer number (4963560).

Almost surely, 2^56645980 is an apocalyptic number.

It is an amenable number.

56645980 is an abundant number, since it is smaller than the sum of its proper divisors (62479460).

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

56645980 is a wasteful number, since it uses less digits than its factorization.

56645980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 56645980 is about 7526.3523701724. The cubic root of 56645980 is about 384.0517056388.

The spelling of 56645980 in words is "fifty-six million, six hundred forty-five thousand, nine hundred eighty".