57696640 has 64 divisors (see below), whose sum is σ = 146072160. Its totient is φ = 21716992.

The previous prime is 57696637. The next prime is 57696671. The reversal of 57696640 is 4669675.

It is a tau number, because it is divible by the number of its divisors (64).

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, 8229 + ... + 13531.

Almost surely, 2^57696640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57696640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73036080).

57696640 is an abundant number, since it is smaller than the sum of its proper divisors (88375520).

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

57696640 is a wasteful number, since it uses less digits than its factorization.

57696640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339 (or 5327 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 57696640 is about 7595.8304351796. The cubic root of 57696640 is about 386.4116167151.

The spelling of 57696640 in words is "fifty-seven million, six hundred ninety-six thousand, six hundred forty".