13881968 has 10 divisors (see below), whose sum is σ = 26896344. Its totient is φ = 6940976.

The previous prime is 13881943. The next prime is 13881977. The reversal of 13881968 is 86918831.

It is a happy number.

13881968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433796 + ... + 433827.

Almost surely, 2^13881968 is an apocalyptic number.

It is an amenable number.

13881968 is a deficient number, since it is larger than the sum of its proper divisors (13014376).

13881968 is an equidigital number, since it uses as much as digits as its factorization.

13881968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867631 (or 867625 counting only the distinct ones).

The product of its digits is 82944, while the sum is 44.

The square root of 13881968 is about 3725.8513121165. The cubic root of 13881968 is about 240.3349951548.

The spelling of 13881968 in words is "thirteen million, eight hundred eighty-one thousand, nine hundred sixty-eight".