56391385 has 16 divisors (see below), whose sum is σ = 68889600. Its totient is φ = 44306496.

The previous prime is 56391371. The next prime is 56391437. The reversal of 56391385 is 58319365.

It is a cyclic number.

It is not a de Polignac number, because 56391385 - 2²³ = 48002777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144771 + ... + 145159.

It is an arithmetic number, because the mean of its divisors is an integer number (4305600).

Almost surely, 2^56391385 is an apocalyptic number.

It is an amenable number.

56391385 is a deficient number, since it is larger than the sum of its proper divisors (12498215).

56391385 is a wasteful number, since it uses less digits than its factorization.

56391385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 97200, while the sum is 40.

The square root of 56391385 is about 7509.4197512191. The cubic root of 56391385 is about 383.4754688204.

The spelling of 56391385 in words is "fifty-six million, three hundred ninety-one thousand, three hundred eighty-five".