56397887 has 16 divisors (see below), whose sum is σ = 69619200. Its totient is φ = 44489952.

The previous prime is 56397877. The next prime is 56397889. The reversal of 56397887 is 78879365.

It is not a de Polignac number, because 56397887 - 2⁸ = 56397631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56397889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39614 + ... + 41012.

It is an arithmetic number, because the mean of its divisors is an integer number (4351200).

Almost surely, 2^56397887 is an apocalyptic number.

56397887 is a deficient number, since it is larger than the sum of its proper divisors (13221313).

56397887 is a wasteful number, since it uses less digits than its factorization.

56397887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862.

The product of its digits is 2540160, while the sum is 53.

The square root of 56397887 is about 7509.8526616705. The cubic root of 56397887 is about 383.4902066607.

The spelling of 56397887 in words is "fifty-six million, three hundred ninety-seven thousand, eight hundred eighty-seven".