13917568 has 64 divisors (see below), whose sum is σ = 32436000. Its totient is φ = 5945856.

The previous prime is 13917559. The next prime is 13917581. The reversal of 13917568 is 86571931.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 13917568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43746 + ... + 44062.

Almost surely, 2^13917568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13917568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16218000).

13917568 is an abundant number, since it is smaller than the sum of its proper divisors (18518432).

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

13917568 is an frugal number, since it uses more digits than its factorization.

13917568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 326 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 13917568 is about 3730.6256847880. The cubic root of 13917568 is about 240.5402643789.

The spelling of 13917568 in words is "thirteen million, nine hundred seventeen thousand, five hundred sixty-eight".