56569387 has 16 divisors (see below), whose sum is σ = 69584832. Its totient is φ = 44881920.

The previous prime is 56569369. The next prime is 56569417. The reversal of 56569387 is 78396565.

It is a cyclic number.

It is not a de Polignac number, because 56569387 - 2¹⁵ = 56536619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56569387.

It is not an unprimeable number, because it can be changed into a prime (56569187) 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, 3363 + ... + 11155.

It is an arithmetic number, because the mean of its divisors is an integer number (4349052).

Almost surely, 2^56569387 is an apocalyptic number.

56569387 is a deficient number, since it is larger than the sum of its proper divisors (13015445).

56569387 is a wasteful number, since it uses less digits than its factorization.

56569387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878.

The product of its digits is 1360800, while the sum is 49.

The square root of 56569387 is about 7521.2623275618. The cubic root of 56569387 is about 383.8785310067.

The spelling of 56569387 in words is "fifty-six million, five hundred sixty-nine thousand, three hundred eighty-seven".