239439564 has 144 divisors (see below), whose sum is σ = 772798208. Its totient is φ = 63125568.

The previous prime is 239439559. The next prime is 239439623. The reversal of 239439564 is 465934932.

239439564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87099 + ... + 89805.

Almost surely, 2^239439564 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 239439564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386399104).

239439564 is an abundant number, since it is smaller than the sum of its proper divisors (533358644).

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

239439564 is a wasteful number, since it uses less digits than its factorization.

239439564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2732 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 239439564 is about 15473.8348188159. The cubic root of 239439564 is about 620.9624005801.

The spelling of 239439564 in words is "two hundred thirty-nine million, four hundred thirty-nine thousand, five hundred sixty-four".