12389864 has 8 divisors (see below), whose sum is σ = 23231010. Its totient is φ = 6194928.

The previous prime is 12389833. The next prime is 12389879. The reversal of 12389864 is 46898321.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 209764 = 3490^2 + 458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 774359 + ... + 774374.

Almost surely, 2^12389864 is an apocalyptic number.

It is an amenable number.

12389864 is a deficient number, since it is larger than the sum of its proper divisors (10841146).

12389864 is a wasteful number, since it uses less digits than its factorization.

12389864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548739 (or 1548735 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 12389864 is about 3519.9238628129. The cubic root of 12389864 is about 231.3958219312.

The spelling of 12389864 in words is "twelve million, three hundred eighty-nine thousand, eight hundred sixty-four".