13944385 has 32 divisors (see below), whose sum is σ = 21692160. Its totient is φ = 8356608.

The previous prime is 13944379. The next prime is 13944401. The reversal of 13944385 is 58344931.

It is not a de Polignac number, because 13944385 - 2³ = 13944377 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7839 + ... + 9451.

It is an arithmetic number, because the mean of its divisors is an integer number (677880).

Almost surely, 2^13944385 is an apocalyptic number.

It is an amenable number.

13944385 is a deficient number, since it is larger than the sum of its proper divisors (7747775).

13944385 is a wasteful number, since it uses less digits than its factorization.

13944385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657.

The product of its digits is 51840, while the sum is 37.

The square root of 13944385 is about 3734.2181243200. The cubic root of 13944385 is about 240.6946598791.

The spelling of 13944385 in words is "thirteen million, nine hundred forty-four thousand, three hundred eighty-five".