239131920 has 80 divisors (see below), whose sum is σ = 773557632. Its totient is φ = 60994560.

The previous prime is 239131909. The next prime is 239131931. The reversal of 239131920 is 29131932.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (239131909) and next prime (239131931).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16141 + ... + 27180.

Almost surely, 2^239131920 is an apocalyptic number.

239131920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239131920 is an abundant number, since it is smaller than the sum of its proper divisors (534425712).

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

239131920 is a wasteful number, since it uses less digits than its factorization.

239131920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43360 (or 43354 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 239131920 is about 15463.8908428636. The cubic root of 239131920 is about 620.6963386850.

The spelling of 239131920 in words is "two hundred thirty-nine million, one hundred thirty-one thousand, nine hundred twenty".