13931660 has 24 divisors (see below), whose sum is σ = 29364720. Its totient is φ = 5552064.

The previous prime is 13931639. The next prime is 13931663. The reversal of 13931660 is 6613931.

It is not an unprimeable number, because it can be changed into a prime (13931663) 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, 5006 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (1223530).

Almost surely, 2^13931660 is an apocalyptic number.

13931660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13931660 is an abundant number, since it is smaller than the sum of its proper divisors (15433060).

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

13931660 is a wasteful number, since it uses less digits than its factorization.

13931660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2583 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 13931660 is about 3732.5138981657. The cubic root of 13931660 is about 240.6214219966.

The spelling of 13931660 in words is "thirteen million, nine hundred thirty-one thousand, six hundred sixty".