56831978 has 16 divisors (see below), whose sum is σ = 97560960. Its totient is φ = 24322896.

The previous prime is 56831849. The next prime is 56831981. The reversal of 56831978 is 87913865.

It is a happy 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, 9563 + ... + 14321.

It is an arithmetic number, because the mean of its divisors is an integer number (6097560).

Almost surely, 2^56831978 is an apocalyptic number.

56831978 is a deficient number, since it is larger than the sum of its proper divisors (40728982).

56831978 is a wasteful number, since it uses less digits than its factorization.

56831978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621.

The product of its digits is 362880, while the sum is 47.

The square root of 56831978 is about 7538.6986940718. The cubic root of 56831978 is about 384.4715930860.

The spelling of 56831978 in words is "fifty-six million, eight hundred thirty-one thousand, nine hundred seventy-eight".