13899988 has 12 divisors (see below), whose sum is σ = 24475360. Its totient is φ = 6907032.

The previous prime is 13899983. The next prime is 13899989. The reversal of 13899988 is 88999831.

It is a super-3 number, since 3×13899988³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10008 + ... + 11311.

Almost surely, 2^13899988 is an apocalyptic number.

It is an amenable number.

13899988 is a deficient number, since it is larger than the sum of its proper divisors (10575372).

13899988 is a wasteful number, since it uses less digits than its factorization.

13899988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21486 (or 21484 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 55.

The square root of 13899988 is about 3728.2687671358. The cubic root of 13899988 is about 240.4389420886.

The spelling of 13899988 in words is "thirteen million, eight hundred ninety-nine thousand, nine hundred eighty-eight".