57640332 has 12 divisors (see below), whose sum is σ = 134494136. Its totient is φ = 19213440.

The previous prime is 57640321. The next prime is 57640333. The reversal of 57640332 is 23304675.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 57640332.

It is not an unprimeable number, because it can be changed into a prime (57640333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2401669 + ... + 2401692.

Almost surely, 2^57640332 is an apocalyptic number.

It is an amenable number.

57640332 is an abundant number, since it is smaller than the sum of its proper divisors (76853804).

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

57640332 is a wasteful number, since it uses less digits than its factorization.

57640332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803368 (or 4803366 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 57640332 is about 7592.1230232393. The cubic root of 57640332 is about 386.2858719734.

The spelling of 57640332 in words is "fifty-seven million, six hundred forty thousand, three hundred thirty-two".