565904 has 20 divisors (see below), whose sum is σ = 1109676. Its totient is φ = 279552.

The previous prime is 565891. The next prime is 565907. The reversal of 565904 is 409565.

It can be written as a sum of positive squares in 2 ways, for example, as 6400 + 559504 = 80^2 + 748^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565904.

It is not an unprimeable number, because it can be changed into a prime (565907) by changing a digit.

565904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652 + ... + 1964.

2⁵⁶⁵⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

565904 is a deficient number, since it is larger than the sum of its proper divisors (543772).

565904 is a wasteful number, since it uses less digits than its factorization.

565904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 565904 is about 752.2659104333. The cubic root of 565904 is about 82.7143614238.

The spelling of 565904 in words is "five hundred sixty-five thousand, nine hundred four".