565944 has 16 divisors (see below), whose sum is σ = 1414920. Its totient is φ = 188640.

The previous prime is 565937. The next prime is 565973. The reversal of 565944 is 449565.

It is a super-2 number, since 2×565944² = 640585222272, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11767 + ... + 11814.

2⁵⁶⁵⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

565944 is an abundant number, since it is smaller than the sum of its proper divisors (848976).

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

565944 is a wasteful number, since it uses less digits than its factorization.

565944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23590 (or 23586 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 565944 is about 752.2924963071. The cubic root of 565944 is about 82.7163102211.

The spelling of 565944 in words is "five hundred sixty-five thousand, nine hundred forty-four".