57159640 has 16 divisors (see below), whose sum is σ = 128609280. Its totient is φ = 22863840.

The previous prime is 57159589. The next prime is 57159647. The reversal of 57159640 is 4695175.

It is a self number, because there is not a number n which added to its sum of digits gives 57159640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57159647) 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, 714456 + ... + 714535.

It is an arithmetic number, because the mean of its divisors is an integer number (8038080).

Almost surely, 2^57159640 is an apocalyptic number.

It is an amenable number.

57159640 is an abundant number, since it is smaller than the sum of its proper divisors (71449640).

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

57159640 is a wasteful number, since it uses less digits than its factorization.

57159640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429002 (or 1428998 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 57159640 is about 7560.3994603460. The cubic root of 57159640 is about 385.2090616957.

The spelling of 57159640 in words is "fifty-seven million, one hundred fifty-nine thousand, six hundred forty".