12945688 has 64 divisors (see below), whose sum is σ = 30528000. Its totient is φ = 5027616.

The previous prime is 12945679. The next prime is 12945701. The reversal of 12945688 is 88654921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562845 + ... + 562867.

It is an arithmetic number, because the mean of its divisors is an integer number (477000).

Almost surely, 2^12945688 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 12945688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15264000).

12945688 is an abundant number, since it is smaller than the sum of its proper divisors (17582312).

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

12945688 is an equidigital number, since it uses as much as digits as its factorization.

12945688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 51 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 12945688 is about 3598.0116731328. The cubic root of 12945688 is about 234.8055612121.

The spelling of 12945688 in words is "twelve million, nine hundred forty-five thousand, six hundred eighty-eight".