13721392 has 20 divisors (see below), whose sum is σ = 26647600. Its totient is φ = 6844608.

The previous prime is 13721381. The next prime is 13721419. The reversal of 13721392 is 29312731.

13721392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13721392.

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, 9109 + ... + 10507.

It is an arithmetic number, because the mean of its divisors is an integer number (1332380).

Almost surely, 2^13721392 is an apocalyptic number.

It is an amenable number.

13721392 is a deficient number, since it is larger than the sum of its proper divisors (12926208).

13721392 is a wasteful number, since it uses less digits than its factorization.

13721392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 2014 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 13721392 is about 3704.2397330626. The cubic root of 13721392 is about 239.4047284736.

The spelling of 13721392 in words is "thirteen million, seven hundred twenty-one thousand, three hundred ninety-two".