239564 has 24 divisors (see below), whose sum is σ = 479808. Its totient is φ = 103680.

The previous prime is 239557. The next prime is 239567. The reversal of 239564 is 465932.

It is not an unprimeable number, because it can be changed into a prime (239567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (19992).

2²³⁹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

239564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

239564 is a wasteful number, since it uses less digits than its factorization.

239564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 303 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 239564 is about 489.4527556363. The cubic root of 239564 is about 62.1069952696.

The spelling of 239564 in words is "two hundred thirty-nine thousand, five hundred sixty-four".