565984 has 24 divisors (see below), whose sum is σ = 1164240. Its totient is φ = 270336.

The previous prime is 565979. The next prime is 565997. The reversal of 565984 is 489565.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352 + ... + 1120.

It is an arithmetic number, because the mean of its divisors is an integer number (48510).

2⁵⁶⁵⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582120).

565984 is an abundant number, since it is smaller than the sum of its proper divisors (598256).

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

565984 is a wasteful number, since it uses less digits than its factorization.

565984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 794 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 565984 is about 752.3190812415. The cubic root of 565984 is about 82.7182589265.

The spelling of 565984 in words is "five hundred sixty-five thousand, nine hundred eighty-four".