13999408 has 20 divisors (see below), whose sum is σ = 27395568. Its totient is φ = 6929600.

The previous prime is 13999399. The next prime is 13999421. The reversal of 13999408 is 80499931.

13999408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2716 + ... + 5947.

Almost surely, 2^13999408 is an apocalyptic number.

It is an amenable number.

13999408 is a deficient number, since it is larger than the sum of its proper divisors (13396160).

13999408 is a wasteful number, since it uses less digits than its factorization.

13999408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8772 (or 8766 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 13999408 is about 3741.5782766100. The cubic root of 13999408 is about 241.0108292167.

The spelling of 13999408 in words is "thirteen million, nine hundred ninety-nine thousand, four hundred eight".