56657920 has 96 divisors (see below), whose sum is σ = 148599360. Its totient is φ = 20561920.

The previous prime is 56657917. The next prime is 56657927. The reversal of 56657920 is 2975665.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (56657927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112389 + ... + 112891.

It is an arithmetic number, because the mean of its divisors is an integer number (1547910).

Almost surely, 2^56657920 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 56657920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74299680).

56657920 is an abundant number, since it is smaller than the sum of its proper divisors (91941440).

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

56657920 is a wasteful number, since it uses less digits than its factorization.

56657920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 56657920 is about 7527.1455413058. The cubic root of 56657920 is about 384.0786875783.

The spelling of 56657920 in words is "fifty-six million, six hundred fifty-seven thousand, nine hundred twenty".