239139920 has 40 divisors (see below), whose sum is σ = 561750504. Its totient is φ = 94666752.

The previous prime is 239139913. The next prime is 239139961. The reversal of 239139920 is 29931932.

It can be written as a sum of positive squares in 4 ways, for example, as 4624 + 239135296 = 68^2 + 15464^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7649 + ... + 23168.

Almost surely, 2^239139920 is an apocalyptic number.

239139920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239139920 is an abundant number, since it is smaller than the sum of its proper divisors (322610584).

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

239139920 is a wasteful number, since it uses less digits than its factorization.

239139920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30927 (or 30921 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 239139920 is about 15464.1495078132. The cubic root of 239139920 is about 620.7032602694.

It can be divided in two parts, 23913 and 9920, that added together give a palindrome (33833).

The spelling of 239139920 in words is "two hundred thirty-nine million, one hundred thirty-nine thousand, nine hundred twenty".