56578978 has 4 divisors (see below), whose sum is σ = 84868470. Its totient is φ = 28289488.

The previous prime is 56578967. The next prime is 56578981. The reversal of 56578978 is 87987565.

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., 45603009 + 10975969 = 6753^2 + 3313^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144743 + ... + 14144746.

Almost surely, 2^56578978 is an apocalyptic number.

56578978 is a deficient number, since it is larger than the sum of its proper divisors (28289492).

56578978 is a wasteful number, since it uses less digits than its factorization.

56578978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28289491.

The product of its digits is 4233600, while the sum is 55.

The square root of 56578978 is about 7521.8998929792. The cubic root of 56578978 is about 383.9002245476.

The spelling of 56578978 in words is "fifty-six million, five hundred seventy-eight thousand, nine hundred seventy-eight".