56651920 has 160 divisors (see below), whose sum is σ = 154990080. Its totient is φ = 19077120.

The previous prime is 56651893. The next prime is 56651929. The reversal of 56651920 is 2915665.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (56651929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928690 + ... + 928750.

It is an arithmetic number, because the mean of its divisors is an integer number (968688).

Almost surely, 2^56651920 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 56651920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77495040).

56651920 is an abundant number, since it is smaller than the sum of its proper divisors (98338160).

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

56651920 is a wasteful number, since it uses less digits than its factorization.

56651920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 56651920 is about 7526.7469732946. The cubic root of 56651920 is about 384.0651292886.

The spelling of 56651920 in words is "fifty-six million, six hundred fifty-one thousand, nine hundred twenty".