565440 has 112 divisors (see below), whose sum is σ = 1950720. Its totient is φ = 138240.

The previous prime is 565429. The next prime is 565441. The reversal of 565440 is 44565.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 565440.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565440.

It is not an unprimeable number, because it can be changed into a prime (565441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18225 + ... + 18255.

2⁵⁶⁵⁴⁴⁰ 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 565440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975360).

565440 is an abundant number, since it is smaller than the sum of its proper divisors (1385280).

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

565440 is a wasteful number, since it uses less digits than its factorization.

565440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 565440 is about 751.9574456045. The cubic root of 565440 is about 82.6917486615.

The spelling of 565440 in words is "five hundred sixty-five thousand, four hundred forty".