13291956 has 36 divisors (see below), whose sum is σ = 33755904. Its totient is φ = 4410000.

The previous prime is 13291939. The next prime is 13292009. The reversal of 13291956 is 65919231.

13291956 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13291956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8301 + ... + 9771.

It is an arithmetic number, because the mean of its divisors is an integer number (937664).

Almost surely, 2^13291956 is an apocalyptic number.

It is an amenable number.

13291956 is an abundant number, since it is smaller than the sum of its proper divisors (20463948).

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

13291956 is a wasteful number, since it uses less digits than its factorization.

13291956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1727 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 13291956 is about 3645.8134894698. The cubic root of 13291956 is about 236.8806748570.

The spelling of 13291956 in words is "thirteen million, two hundred ninety-one thousand, nine hundred fifty-six".