12917888 has 32 divisors (see below), whose sum is σ = 26344560. Its totient is φ = 6306048.

The previous prime is 12917833. The next prime is 12917939. The reversal of 12917888 is 88871921.

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

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, 4331 + ... + 6677.

Almost surely, 2^12917888 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 12917888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13172280).

12917888 is an abundant number, since it is smaller than the sum of its proper divisors (13426672).

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

12917888 is an equidigital number, since it uses as much as digits as its factorization.

12917888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404 (or 2392 counting only the distinct ones).

The product of its digits is 64512, while the sum is 44.

The square root of 12917888 is about 3594.1463520564. The cubic root of 12917888 is about 234.6373643394.

The spelling of 12917888 in words is "twelve million, nine hundred seventeen thousand, eight hundred eighty-eight".