13989944 has 8 divisors (see below), whose sum is σ = 26231160. Its totient is φ = 6994968.

The previous prime is 13989931. The next prime is 13989953. The reversal of 13989944 is 44998931.

13989944 is digitally balanced in base 2, because in such base 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 (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874364 + ... + 874379.

It is an arithmetic number, because the mean of its divisors is an integer number (3278895).

Almost surely, 2^13989944 is an apocalyptic number.

It is an amenable number.

13989944 is a deficient number, since it is larger than the sum of its proper divisors (12241216).

13989944 is a wasteful number, since it uses less digits than its factorization.

13989944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748749 (or 1748745 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 13989944 is about 3740.3133558567. The cubic root of 13989944 is about 240.9565069037.

The spelling of 13989944 in words is "thirteen million, nine hundred eighty-nine thousand, nine hundred forty-four".