56749887 has 12 divisors (see below), whose sum is σ = 83010720. Its totient is φ = 37353888.

The previous prime is 56749883. The next prime is 56749939. The reversal of 56749887 is 78894765.

It is not a de Polignac number, because 56749887 - 2² = 56749883 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56749883) 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, 39198 + ... + 40619.

It is an arithmetic number, because the mean of its divisors is an integer number (6917560).

Almost surely, 2^56749887 is an apocalyptic number.

56749887 is a deficient number, since it is larger than the sum of its proper divisors (26260833).

56749887 is a wasteful number, since it uses less digits than its factorization.

56749887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79902 (or 79899 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 56749887 is about 7533.2520865825. The cubic root of 56749887 is about 384.2863871082.

The spelling of 56749887 in words is "fifty-six million, seven hundred forty-nine thousand, eight hundred eighty-seven".