13391872 has 48 divisors (see below), whose sum is σ = 28894320. Its totient is φ = 6168576.

The previous prime is 13391867. The next prime is 13391909. The reversal of 13391872 is 27819331.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26373 + ... + 26875.

It is an arithmetic number, because the mean of its divisors is an integer number (601965).

Almost surely, 2^13391872 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 13391872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14447160).

13391872 is an abundant number, since it is smaller than the sum of its proper divisors (15502448).

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

13391872 is an equidigital number, since it uses as much as digits as its factorization.

13391872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 518 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 13391872 is about 3659.4906749437. The cubic root of 13391872 is about 237.4727399922.

The spelling of 13391872 in words is "thirteen million, three hundred ninety-one thousand, eight hundred seventy-two".