12664388 has 24 divisors (see below), whose sum is σ = 25601184. Its totient is φ = 5417600.

The previous prime is 12664373. The next prime is 12664423. The reversal of 12664388 is 88346621.

It is a happy 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, 7718 + ... + 9213.

It is an arithmetic number, because the mean of its divisors is an integer number (1066716).

Almost surely, 2^12664388 is an apocalyptic number.

It is an amenable number.

12664388 is an abundant number, since it is smaller than the sum of its proper divisors (12936796).

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

12664388 is a wasteful number, since it uses less digits than its factorization.

12664388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16963 (or 16961 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 12664388 is about 3558.7059445815. The cubic root of 12664388 is about 233.0923761989.

The spelling of 12664388 in words is "twelve million, six hundred sixty-four thousand, three hundred eighty-eight".