13999928 has 8 divisors (see below), whose sum is σ = 26249880. Its totient is φ = 6999960.

The previous prime is 13999919. The next prime is 13999957. The reversal of 13999928 is 82999931.

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, 874988 + ... + 875003.

It is an arithmetic number, because the mean of its divisors is an integer number (3281235).

Almost surely, 2^13999928 is an apocalyptic number.

It is an amenable number.

13999928 is a deficient number, since it is larger than the sum of its proper divisors (12249952).

13999928 is a wasteful number, since it uses less digits than its factorization.

13999928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749997 (or 1749993 counting only the distinct ones).

The product of its digits is 314928, while the sum is 50.

The square root of 13999928 is about 3741.6477653569. The cubic root of 13999928 is about 241.0138132496.

The spelling of 13999928 in words is "thirteen million, nine hundred ninety-nine thousand, nine hundred twenty-eight".