56873565 has 36 divisors (see below), whose sum is σ = 114680124. Its totient is φ = 25998336.

The previous prime is 56873543. The next prime is 56873567. The reversal of 56873565 is 56537865.

56873565 is a `hidden beast` number, since 5 + 6 + 87 + 3 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11148921 + 45724644 = 3339^2 + 6762^2 .

It is not a de Polignac number, because 56873565 - 2⁶ = 56873501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56873565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56873567) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10692 + ... + 15101.

It is an arithmetic number, because the mean of its divisors is an integer number (3185559).

Almost surely, 2^56873565 is an apocalyptic number.

It is an amenable number.

56873565 is an abundant number, since it is smaller than the sum of its proper divisors (57806559).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56873565 is a wasteful number, since it uses less digits than its factorization.

56873565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25818 (or 25808 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 56873565 is about 7541.4564243255. The cubic root of 56873565 is about 384.5653497015.

The spelling of 56873565 in words is "fifty-six million, eight hundred seventy-three thousand, five hundred sixty-five".