56021980 has 24 divisors (see below), whose sum is σ = 134453088. Its totient is φ = 19207488.

The previous prime is 56021963. The next prime is 56022017. The reversal of 56021980 is 8912065.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 199939 + ... + 200218.

It is an arithmetic number, because the mean of its divisors is an integer number (5602212).

Almost surely, 2^56021980 is an apocalyptic number.

It is an amenable number.

56021980 is an abundant number, since it is smaller than the sum of its proper divisors (78431108).

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

56021980 is a wasteful number, since it uses less digits than its factorization.

56021980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400173 (or 400171 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 56021980 is about 7484.7832299940. The cubic root of 56021980 is about 382.6362850397.

The spelling of 56021980 in words is "fifty-six million, twenty-one thousand, nine hundred eighty".