56864978 has 4 divisors (see below), whose sum is σ = 85297470. Its totient is φ = 28432488.

The previous prime is 56864959. The next prime is 56864999. The reversal of 56864978 is 87946865.

56864978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35916049 + 20948929 = 5993^2 + 4577^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14216243 + ... + 14216246.

Almost surely, 2^56864978 is an apocalyptic number.

56864978 is a deficient number, since it is larger than the sum of its proper divisors (28432492).

56864978 is a wasteful number, since it uses less digits than its factorization.

56864978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28432491.

The product of its digits is 2903040, while the sum is 53.

The square root of 56864978 is about 7540.8870830957. The cubic root of 56864978 is about 384.5459943186.

The spelling of 56864978 in words is "fifty-six million, eight hundred sixty-four thousand, nine hundred seventy-eight".