239685864 has 64 divisors (see below), whose sum is σ = 662696640. Its totient is φ = 71631360.

The previous prime is 239685863. The next prime is 239685949. The reversal of 239685864 is 468586932.

It is not an unprimeable number, because it can be changed into a prime (239685863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13054 + ... + 25490.

It is an arithmetic number, because the mean of its divisors is an integer number (10354635).

Almost surely, 2^239685864 is an apocalyptic number.

239685864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 239685864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331348320).

239685864 is an abundant number, since it is smaller than the sum of its proper divisors (423010776).

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

239685864 is a wasteful number, since it uses less digits than its factorization.

239685864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12530 (or 12526 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 239685864 is about 15481.7913692182. The cubic root of 239685864 is about 621.1752456991.

The spelling of 239685864 in words is "two hundred thirty-nine million, six hundred eighty-five thousand, eight hundred sixty-four".