57720916 has 24 divisors (see below), whose sum is σ = 116678016. Its totient is φ = 24693120.

The previous prime is 57720889. The next prime is 57720953. The reversal of 57720916 is 61902775.

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, 37836 + ... + 39331.

It is an arithmetic number, because the mean of its divisors is an integer number (4861584).

Almost surely, 2^57720916 is an apocalyptic number.

It is an amenable number.

57720916 is an abundant number, since it is smaller than the sum of its proper divisors (58957100).

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

57720916 is a wasteful number, since it uses less digits than its factorization.

57720916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77199 (or 77197 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 57720916 is about 7597.4282490853. The cubic root of 57720916 is about 386.4658036550.

The spelling of 57720916 in words is "fifty-seven million, seven hundred twenty thousand, nine hundred sixteen".