12399668 has 24 divisors (see below), whose sum is σ = 23079168. Its totient is φ = 5816096.

The previous prime is 12399649. The next prime is 12399677. The reversal of 12399668 is 86699321.

12399668 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 in 7 ways as a sum of consecutive naturals, for example, 3605 + ... + 6147.

It is an arithmetic number, because the mean of its divisors is an integer number (961632).

Almost surely, 2^12399668 is an apocalyptic number.

It is an amenable number.

12399668 is a deficient number, since it is larger than the sum of its proper divisors (10679500).

12399668 is a wasteful number, since it uses less digits than its factorization.

12399668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623 (or 2621 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 12399668 is about 3521.3162311840. The cubic root of 12399668 is about 231.4568397256.

The spelling of 12399668 in words is "twelve million, three hundred ninety-nine thousand, six hundred sixty-eight".