57015640 has 32 divisors (see below), whose sum is σ = 139948560. Its totient is φ = 20732800.

The previous prime is 57015589. The next prime is 57015659. The reversal of 57015640 is 4651075.

It is a junction number, because it is equal to n+sod(n) for n = 57015599 and 57015608.

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, 64351 + ... + 65230.

Almost surely, 2^57015640 is an apocalyptic number.

It is an amenable number.

57015640 is an abundant number, since it is smaller than the sum of its proper divisors (82932920).

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

57015640 is a wasteful number, since it uses less digits than its factorization.

57015640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129603 (or 129599 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 57015640 is about 7550.8701485326. The cubic root of 57015640 is about 384.8853090653.

The spelling of 57015640 in words is "fifty-seven million, fifteen thousand, six hundred forty".