13681472 has 28 divisors (see below), whose sum is σ = 31028640. Its totient is φ = 5863296.

The previous prime is 13681469. The next prime is 13681483. The reversal of 13681472 is 27418631.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 14822 + ... + 15717.

Almost surely, 2^13681472 is an apocalyptic number.

It is an amenable number.

13681472 is an abundant number, since it is smaller than the sum of its proper divisors (17347168).

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

13681472 is an equidigital number, since it uses as much as digits as its factorization.

13681472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30558 (or 30548 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 13681472 is about 3698.8473880386. The cubic root of 13681472 is about 239.1723341716.

The spelling of 13681472 in words is "thirteen million, six hundred eighty-one thousand, four hundred seventy-two".