57978715 has 16 divisors (see below), whose sum is σ = 71781696. Its totient is φ = 44928000.

The previous prime is 57978703. The next prime is 57978719. The reversal of 57978715 is 51787975.

It is a de Polignac number, because none of the positive numbers 2^k-57978715 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57978719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30019 + ... + 31891.

It is an arithmetic number, because the mean of its divisors is an integer number (4486356).

Almost surely, 2^57978715 is an apocalyptic number.

57978715 is a deficient number, since it is larger than the sum of its proper divisors (13802981).

57978715 is a wasteful number, since it uses less digits than its factorization.

57978715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070.

The product of its digits is 617400, while the sum is 49.

The square root of 57978715 is about 7614.3755489206. The cubic root of 57978715 is about 387.0403067696.

The spelling of 57978715 in words is "fifty-seven million, nine hundred seventy-eight thousand, seven hundred fifteen".