565780 has 12 divisors (see below), whose sum is σ = 1188180. Its totient is φ = 226304.

The previous prime is 565771. The next prime is 565787. The reversal of 565780 is 87565.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 171396 = 628^2 + 414^2 .

It is a super-3 number, since 3×565780³ = 543330429637656000, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14125 + ... + 14164.

It is an arithmetic number, because the mean of its divisors is an integer number (99015).

2⁵⁶⁵⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

565780 is an abundant number, since it is smaller than the sum of its proper divisors (622400).

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

565780 is a wasteful number, since it uses less digits than its factorization.

565780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28298 (or 28296 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 565780 is about 752.1834882527. The cubic root of 565780 is about 82.7083195686.

The spelling of 565780 in words is "five hundred sixty-five thousand, seven hundred eighty".