13888920 has 32 divisors (see below), whose sum is σ = 41667120. Its totient is φ = 3703680.

The previous prime is 13888879. The next prime is 13888933. The reversal of 13888920 is 2988831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57751 + ... + 57990.

Almost surely, 2^13888920 is an apocalyptic number.

13888920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13888920 is an abundant number, since it is smaller than the sum of its proper divisors (27778200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13888920 is a wasteful number, since it uses less digits than its factorization.

13888920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115755 (or 115751 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 13888920 is about 3726.7841364909. The cubic root of 13888920 is about 240.3751078644.

The spelling of 13888920 in words is "thirteen million, eight hundred eighty-eight thousand, nine hundred twenty".