13631872 has 32 divisors (see below), whose sum is σ = 27325800. Its totient is φ = 6773760.

The previous prime is 13631857. The next prime is 13631879. The reversal of 13631872 is 27813631.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13631879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35779 + ... + 36157.

Almost surely, 2^13631872 is an apocalyptic number.

It is an amenable number.

13631872 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

13631872 is an equidigital number, since it uses as much as digits as its factorization.

13631872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 662 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 13631872 is about 3692.1365088523. The cubic root of 13631872 is about 238.8829571109.

The spelling of 13631872 in words is "thirteen million, six hundred thirty-one thousand, eight hundred seventy-two".