13664172 has 12 divisors (see below), whose sum is σ = 31883096. Its totient is φ = 4554720.

The previous prime is 13664159. The next prime is 13664219. The reversal of 13664172 is 27146631.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569329 + ... + 569352.

Almost surely, 2^13664172 is an apocalyptic number.

13664172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13664172 is an abundant number, since it is smaller than the sum of its proper divisors (18218924).

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

13664172 is a wasteful number, since it uses less digits than its factorization.

13664172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138688 (or 1138686 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 13664172 is about 3696.5080819606. The cubic root of 13664172 is about 239.0714818019.

The spelling of 13664172 in words is "thirteen million, six hundred sixty-four thousand, one hundred seventy-two".