13131392 has 32 divisors (see below), whose sum is σ = 26355780. Its totient is φ = 6516736.

The previous prime is 13131373. The next prime is 13131401. The reversal of 13131392 is 29313131.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 1132096 = 3464^2 + 1064^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21848 + ... + 22440.

Almost surely, 2^13131392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13131392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13177890).

13131392 is an abundant number, since it is smaller than the sum of its proper divisors (13224388).

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

13131392 is an equidigital number, since it uses as much as digits as its factorization.

13131392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 768 counting only the distinct ones).

The product of its digits is 486, while the sum is 23.

The square root of 13131392 is about 3623.7262589771. The cubic root of 13131392 is about 235.9229854995.

The spelling of 13131392 in words is "thirteen million, one hundred thirty-one thousand, three hundred ninety-two".