13987120 has 40 divisors (see below), whose sum is σ = 37167264. Its totient is φ = 4795392.

The previous prime is 13987111. The next prime is 13987139. The reversal of 13987120 is 2178931.

13987120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 11929 + ... + 13048.

Almost surely, 2^13987120 is an apocalyptic number.

13987120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13987120 is an abundant number, since it is smaller than the sum of its proper divisors (23180144).

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

13987120 is a wasteful number, since it uses less digits than its factorization.

13987120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24997 (or 24991 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 13987120 is about 3739.9358283265. The cubic root of 13987120 is about 240.9402927104.

The spelling of 13987120 in words is "thirteen million, nine hundred eighty-seven thousand, one hundred twenty".