564990 has 32 divisors (see below), whose sum is σ = 1395360. Its totient is φ = 146304.

The previous prime is 564989. The next prime is 564997. The reversal of 564990 is 99465.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 856 + ... + 1364.

It is an arithmetic number, because the mean of its divisors is an integer number (43605).

2⁵⁶⁴⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 564990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697680).

564990 is an abundant number, since it is smaller than the sum of its proper divisors (830370).

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

564990 is a wasteful number, since it uses less digits than its factorization.

564990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 564990 is about 751.6581669882. The cubic root of 564990 is about 82.6698063613.

The spelling of 564990 in words is "five hundred sixty-four thousand, nine hundred ninety".