57506640 has 40 divisors (see below), whose sum is σ = 178271328. Its totient is φ = 15335040.

The previous prime is 57506611. The next prime is 57506671. The reversal of 57506640 is 4660575.

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

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, 119566 + ... + 120045.

Almost surely, 2^57506640 is an apocalyptic number.

It is an amenable number.

57506640 is an abundant number, since it is smaller than the sum of its proper divisors (120764688).

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

57506640 is a wasteful number, since it uses less digits than its factorization.

57506640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239627 (or 239621 counting only the distinct ones).

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

The square root of 57506640 is about 7583.3132600467. The cubic root of 57506640 is about 385.9869880264.

The spelling of 57506640 in words is "fifty-seven million, five hundred six thousand, six hundred forty".