57641920 has 56 divisors (see below), whose sum is σ = 156874464. Its totient is φ = 19762176.

The previous prime is 57641911. The next prime is 57641939. The reversal of 57641920 is 2914675.

It is a tau number, because it is divible by the number of its divisors (56).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 10627 + ... + 15106.

Almost surely, 2^57641920 is an apocalyptic number.

It is an amenable number.

57641920 is an abundant number, since it is smaller than the sum of its proper divisors (99232544).

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

57641920 is a wasteful number, since it uses less digits than its factorization.

57641920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25757 (or 25747 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 57641920 is about 7592.2276045967. The cubic root of 57641920 is about 386.2894193525.

The spelling of 57641920 in words is "fifty-seven million, six hundred forty-one thousand, nine hundred twenty".