57718640 has 40 divisors (see below), whose sum is σ = 153368160. Its totient is φ = 19789056.

The previous prime is 57718607. The next prime is 57718651. The reversal of 57718640 is 4681775.

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

It is a junction number, because it is equal to n+sod(n) for n = 57718594 and 57718603.

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, 50975 + ... + 52094.

It is an arithmetic number, because the mean of its divisors is an integer number (3834204).

Almost surely, 2^57718640 is an apocalyptic number.

It is an amenable number.

57718640 is an abundant number, since it is smaller than the sum of its proper divisors (95649520).

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

57718640 is a wasteful number, since it uses less digits than its factorization.

57718640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103089 (or 103083 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 57718640 is about 7597.2784600803. The cubic root of 57718640 is about 386.4607239959.

The spelling of 57718640 in words is "fifty-seven million, seven hundred eighteen thousand, six hundred forty".