12312816 has 20 divisors (see below), whose sum is σ = 31808232. Its totient is φ = 4104256.

The previous prime is 12312803. The next prime is 12312829. The reversal of 12312816 is 61821321.

It is an interprime number because it is at equal distance from previous prime (12312803) and next prime (12312829).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 128211 + ... + 128306.

Almost surely, 2^12312816 is an apocalyptic number.

12312816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12312816 is an abundant number, since it is smaller than the sum of its proper divisors (19495416).

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

12312816 is a wasteful number, since it uses less digits than its factorization.

12312816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256528 (or 256522 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 12312816 is about 3508.9622397512. The cubic root of 12312816 is about 230.9151690909.

The spelling of 12312816 in words is "twelve million, three hundred twelve thousand, eight hundred sixteen".