12311864 has 8 divisors (see below), whose sum is σ = 23084760. Its totient is φ = 6155928.

The previous prime is 12311857. The next prime is 12311869. The reversal of 12311864 is 46811321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769484 + ... + 769499.

It is an arithmetic number, because the mean of its divisors is an integer number (2885595).

Almost surely, 2^12311864 is an apocalyptic number.

It is an amenable number.

12311864 is a deficient number, since it is larger than the sum of its proper divisors (10772896).

12311864 is a wasteful number, since it uses less digits than its factorization.

12311864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538989 (or 1538985 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 12311864 is about 3508.8265844866. The cubic root of 12311864 is about 230.9092176523.

The spelling of 12311864 in words is "twelve million, three hundred eleven thousand, eight hundred sixty-four".