564489 has 24 divisors (see below), whose sum is σ = 891072. Its totient is φ = 356400.

The previous prime is 564467. The next prime is 564491. The reversal of 564489 is 984465.

564489 is a `hidden beast` number, since 5 + 644 + 8 + 9 = 666.

It is not a de Polignac number, because 564489 - 2⁵ = 564457 is a prime.

It is a super-2 number, since 2×564489² = 637295662242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (564409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5539 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (37128).

2⁵⁶⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

564489 is a deficient number, since it is larger than the sum of its proper divisors (326583).

564489 is a wasteful number, since it uses less digits than its factorization.

564489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 127 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 564489 is about 751.3248298839. The cubic root of 564489 is about 82.6453635562.

Subtracting from 564489 its sum of digits (36), we obtain a triangular number (564453 = T₁₀₆₂).

The spelling of 564489 in words is "five hundred sixty-four thousand, four hundred eighty-nine".