56978775 has 96 divisors (see below), whose sum is σ = 123801600. Its totient is φ = 25142400.

The previous prime is 56978771. The next prime is 56978783. The reversal of 56978775 is 57787965.

56978775 is a `hidden beast` number, since 569 + 7 + 8 + 7 + 75 = 666.

It is not a de Polignac number, because 56978775 - 2² = 56978771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56978771) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 146281 + ... + 146669.

It is an arithmetic number, because the mean of its divisors is an integer number (1289600).

Almost surely, 2^56978775 is an apocalyptic number.

56978775 is an abundant number, since it is smaller than the sum of its proper divisors (66822825).

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

56978775 is a wasteful number, since it uses less digits than its factorization.

56978775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 435 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 56978775 is about 7548.4286444266. The cubic root of 56978775 is about 384.8023385209.

The spelling of 56978775 in words is "fifty-six million, nine hundred seventy-eight thousand, seven hundred seventy-five".