57640688 has 20 divisors (see below), whose sum is σ = 127633200. Its totient is φ = 24703104.

The previous prime is 57640673. The next prime is 57640721. The reversal of 57640688 is 88604675.

It is a super-2 number, since 2×57640688² = 6644897826226688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257213 + ... + 257436.

It is an arithmetic number, because the mean of its divisors is an integer number (6381660).

Almost surely, 2^57640688 is an apocalyptic number.

It is an amenable number.

57640688 is an abundant number, since it is smaller than the sum of its proper divisors (69992512).

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

57640688 is a wasteful number, since it uses less digits than its factorization.

57640688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514664 (or 514658 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 57640688 is about 7592.1464685555. The cubic root of 57640688 is about 386.2866672354.

The spelling of 57640688 in words is "fifty-seven million, six hundred forty thousand, six hundred eighty-eight".