239972813844 has 12 divisors (see below), whose sum is σ = 559936565664. Its totient is φ = 79990937944.

The previous prime is 239972813809. The next prime is 239972813849. The reversal of 239972813844 is 448318279932.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239972813849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9998867232 + ... + 9998867255.

It is an arithmetic number, because the mean of its divisors is an integer number (46661380472).

Almost surely, 2^239972813844 is an apocalyptic number.

It is an amenable number.

239972813844 is an abundant number, since it is smaller than the sum of its proper divisors (319963751820).

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

239972813844 is a wasteful number, since it uses less digits than its factorization.

239972813844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19997734494 (or 19997734492 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The spelling of 239972813844 in words is "two hundred thirty-nine billion, nine hundred seventy-two million, eight hundred thirteen thousand, eight hundred forty-four".