13971660 has 24 divisors (see below), whose sum is σ = 39120816. Its totient is φ = 3725760.

The previous prime is 13971599. The next prime is 13971667. The reversal of 13971660 is 6617931.

It is not an unprimeable number, because it can be changed into a prime (13971667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116371 + ... + 116490.

It is an arithmetic number, because the mean of its divisors is an integer number (1630034).

Almost surely, 2^13971660 is an apocalyptic number.

13971660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13971660 is an abundant number, since it is smaller than the sum of its proper divisors (25149156).

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

13971660 is a wasteful number, since it uses less digits than its factorization.

13971660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232873 (or 232871 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 13971660 is about 3737.8683764948. The cubic root of 13971660 is about 240.8514893408.

The spelling of 13971660 in words is "thirteen million, nine hundred seventy-one thousand, six hundred sixty".