13688940 has 48 divisors (see below), whose sum is σ = 38499552. Its totient is φ = 3634176.

The previous prime is 13688929. The next prime is 13688951. The reversal of 13688940 is 4988631.

It is an interprime number because it is at equal distance from previous prime (13688929) and next prime (13688951).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19882 + ... + 20558.

It is an arithmetic number, because the mean of its divisors is an integer number (802074).

Almost surely, 2^13688940 is an apocalyptic number.

13688940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13688940 is an abundant number, since it is smaller than the sum of its proper divisors (24810612).

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

13688940 is a wasteful number, since it uses less digits than its factorization.

13688940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 13688940 is about 3699.8567539839. The cubic root of 13688940 is about 239.2158434788.

The spelling of 13688940 in words is "thirteen million, six hundred eighty-eight thousand, nine hundred forty".