56978456 has 8 divisors (see below), whose sum is σ = 106834620. Its totient is φ = 28489224.

The previous prime is 56978447. The next prime is 56978459. The reversal of 56978456 is 65487965.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56978459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3561146 + ... + 3561161.

Almost surely, 2^56978456 is an apocalyptic number.

It is an amenable number.

56978456 is a deficient number, since it is larger than the sum of its proper divisors (49856164).

56978456 is a wasteful number, since it uses less digits than its factorization.

56978456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122313 (or 7122309 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The square root of 56978456 is about 7548.4075141714. The cubic root of 56978456 is about 384.8016204046.

The spelling of 56978456 in words is "fifty-six million, nine hundred seventy-eight thousand, four hundred fifty-six".