56978658 has 36 divisors (see below), whose sum is σ = 135702294. Its totient is φ = 17265600.

The previous prime is 56978641. The next prime is 56978729. The reversal of 56978658 is 85687965.

56978658 is a `hidden beast` number, since 569 + 78 + 6 + 5 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53187849 + 3790809 = 7293^2 + 1947^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10903 + ... + 15258.

Almost surely, 2^56978658 is an apocalyptic number.

56978658 is an abundant number, since it is smaller than the sum of its proper divisors (78723636).

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

56978658 is a wasteful number, since it uses less digits than its factorization.

56978658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26191 (or 26177 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 56978658 is about 7548.4208944653. The cubic root of 56978658 is about 384.8020751369.

The spelling of 56978658 in words is "fifty-six million, nine hundred seventy-eight thousand, six hundred fifty-eight".