12909864 has 64 divisors (see below), whose sum is σ = 35712000. Its totient is φ = 3856320.

The previous prime is 12909839. The next prime is 12909887. The reversal of 12909864 is 46890921.

12909864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 20547 + ... + 21165.

It is an arithmetic number, because the mean of its divisors is an integer number (558000).

Almost surely, 2^12909864 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 12909864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17856000).

12909864 is an abundant number, since it is smaller than the sum of its proper divisors (22802136).

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

12909864 is a wasteful number, since it uses less digits than its factorization.

12909864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 12909864 is about 3593.0299191629. The cubic root of 12909864 is about 234.5887722845.

The spelling of 12909864 in words is "twelve million, nine hundred nine thousand, eight hundred sixty-four".