56776887 has 12 divisors (see below), whose sum is σ = 82282200. Its totient is φ = 37726128.

The previous prime is 56776879. The next prime is 56776943. The reversal of 56776887 is 78867765.

56776887 is a `hidden beast` number, since 567 + 76 + 8 + 8 + 7 = 666.

It is not a de Polignac number, because 56776887 - 2³ = 56776879 is a prime.

It is a super-2 number, since 2×56776887² = 6447229794821538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56776817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7512 + ... + 13037.

It is an arithmetic number, because the mean of its divisors is an integer number (6856850).

Almost surely, 2^56776887 is an apocalyptic number.

56776887 is a deficient number, since it is larger than the sum of its proper divisors (25505313).

56776887 is a wasteful number, since it uses less digits than its factorization.

56776887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20862 (or 20859 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 56776887 is about 7535.0439282064. The cubic root of 56776887 is about 384.3473216635.

The spelling of 56776887 in words is "fifty-six million, seven hundred seventy-six thousand, eight hundred eighty-seven".