13687872 has 56 divisors (see below), whose sum is σ = 39514272. Its totient is φ = 4147200.

The previous prime is 13687871. The next prime is 13687879. The reversal of 13687872 is 27878631.

It is not an unprimeable number, because it can be changed into a prime (13687871) 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, 1129 + ... + 5352.

It is an arithmetic number, because the mean of its divisors is an integer number (705612).

Almost surely, 2^13687872 is an apocalyptic number.

13687872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13687872 is an abundant number, since it is smaller than the sum of its proper divisors (25826400).

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

13687872 is a wasteful number, since it uses less digits than its factorization.

13687872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507 (or 6497 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 13687872 is about 3699.7124212565. The cubic root of 13687872 is about 239.2096221749.

The spelling of 13687872 in words is "thirteen million, six hundred eighty-seven thousand, eight hundred seventy-two".