57000920 has 32 divisors (see below), whose sum is σ = 130172400. Its totient is φ = 22459008.

The previous prime is 57000919. The next prime is 57000953. The reversal of 57000920 is 2900075.

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, 7955 + ... + 13314.

Almost surely, 2^57000920 is an apocalyptic number.

It is an amenable number.

57000920 is an abundant number, since it is smaller than the sum of its proper divisors (73171480).

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

57000920 is a wasteful number, since it uses less digits than its factorization.

57000920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21347 (or 21343 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 57000920 is about 7549.8953635133. The cubic root of 57000920 is about 384.8521836552.

Adding to 57000920 its reverse (2900075), we get a palindrome (59900995).

The spelling of 57000920 in words is "fifty-seven million, nine hundred twenty", and thus it is an aban number.