12387664 has 10 divisors (see below), whose sum is σ = 24001130. Its totient is φ = 6193824.

The previous prime is 12387659. The next prime is 12387671. The reversal of 12387664 is 46678321.

It can be written as a sum of positive squares in only one way, i.e., 12194064 + 193600 = 3492^2 + 440^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387099 + ... + 387130.

It is an arithmetic number, because the mean of its divisors is an integer number (2400113).

Almost surely, 2^12387664 is an apocalyptic number.

It is an amenable number.

12387664 is a deficient number, since it is larger than the sum of its proper divisors (11613466).

12387664 is an equidigital number, since it uses as much as digits as its factorization.

12387664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774237 (or 774231 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 12387664 is about 3519.6113421797. The cubic root of 12387664 is about 231.3821252260.

The spelling of 12387664 in words is "twelve million, three hundred eighty-seven thousand, six hundred sixty-four".