13999880 has 32 divisors (see below), whose sum is σ = 31803840. Its totient is φ = 5545920.

The previous prime is 13999877. The next prime is 13999889. The reversal of 13999880 is 8899931.

13999880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13999889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645 + ... + 5915.

It is an arithmetic number, because the mean of its divisors is an integer number (993870).

Almost surely, 2^13999880 is an apocalyptic number.

13999880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13999880 is an abundant number, since it is smaller than the sum of its proper divisors (17803960).

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

13999880 is a wasteful number, since it uses less digits than its factorization.

13999880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 13999880 is about 3741.6413510651. The cubic root of 13999880 is about 241.0135378035.

The spelling of 13999880 in words is "thirteen million, nine hundred ninety-nine thousand, eight hundred eighty".