57640560 has 40 divisors (see below), whose sum is σ = 178686480. Its totient is φ = 15370752.

The previous prime is 57640559. The next prime is 57640571. The reversal of 57640560 is 6504675.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×57640560² = 6644868314227200, which contains 22 as substring.

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, 119845 + ... + 120324.

It is an arithmetic number, because the mean of its divisors is an integer number (4467162).

Almost surely, 2^57640560 is an apocalyptic number.

It is an amenable number.

57640560 is an abundant number, since it is smaller than the sum of its proper divisors (121045920).

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

57640560 is a wasteful number, since it uses less digits than its factorization.

57640560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240185 (or 240179 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 57640560 is about 7592.1380387872. The cubic root of 57640560 is about 386.2863812989.

The spelling of 57640560 in words is "fifty-seven million, six hundred forty thousand, five hundred sixty".