56918920 has 16 divisors (see below), whose sum is σ = 128067660. Its totient is φ = 22767552.

The previous prime is 56918887. The next prime is 56918923. The reversal of 56918920 is 2981965.

It can be written as a sum of positive squares in 2 ways, for example, as 52330756 + 4588164 = 7234^2 + 2142^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1422973 = 56918920 / (5 + 6 + 9 + 1 + 8 + 9 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (56918923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711447 + ... + 711526.

Almost surely, 2^56918920 is an apocalyptic number.

It is an amenable number.

56918920 is an abundant number, since it is smaller than the sum of its proper divisors (71148740).

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

56918920 is a wasteful number, since it uses less digits than its factorization.

56918920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422984 (or 1422980 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 56918920 is about 7544.4628702115. The cubic root of 56918920 is about 384.6675490683.

The spelling of 56918920 in words is "fifty-six million, nine hundred eighteen thousand, nine hundred twenty".