56688978 has 32 divisors (see below), whose sum is σ = 117653760. Its totient is φ = 18195840.

The previous prime is 56688971. The next prime is 56689013. The reversal of 56688978 is 87988665.

It is not an unprimeable number, because it can be changed into a prime (56688971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17976 + ... + 20892.

It is an arithmetic number, because the mean of its divisors is an integer number (3676680).

Almost surely, 2^56688978 is an apocalyptic number.

56688978 is an abundant number, since it is smaller than the sum of its proper divisors (60964782).

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

56688978 is a wasteful number, since it uses less digits than its factorization.

56688978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042.

The product of its digits is 5806080, while the sum is 57.

The square root of 56688978 is about 7529.2083249170. The cubic root of 56688978 is about 384.1488545082.

The spelling of 56688978 in words is "fifty-six million, six hundred eighty-eight thousand, nine hundred seventy-eight".