13239263844 has 81 divisors (see below), whose sum is σ = 33956369811. Its totient is φ = 4349343600.

The previous prime is 13239263809. The next prime is 13239263857. The reversal of 13239263844 is 44836293231.

The square root of 13239263844 is 115062.

It is a perfect power (a square), and thus also a powerful number.

13239263844 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 9 + 2 + 638 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13239263844.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 87677169 + ... + 87677319.

Almost surely, 2^13239263844 is an apocalyptic number.

13239263844 is the 115062-nd square number.

It is an amenable number.

13239263844 is an abundant number, since it is smaller than the sum of its proper divisors (20717105967).

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

13239263844 is a wasteful number, since it uses less digits than its factorization.

13239263844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 283 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The spelling of 13239263844 in words is "thirteen billion, two hundred thirty-nine million, two hundred sixty-three thousand, eight hundred forty-four".