12356816 has 20 divisors (see below), whose sum is σ = 24589572. Its totient is φ = 6011136.

The previous prime is 12356809. The next prime is 12356843. The reversal of 12356816 is 61865321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7862416 + 4494400 = 2804^2 + 2120^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9845 + ... + 11028.

Almost surely, 2^12356816 is an apocalyptic number.

12356816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12356816 is a deficient number, since it is larger than the sum of its proper divisors (12232756).

12356816 is a wasteful number, since it uses less digits than its factorization.

12356816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20918 (or 20912 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 12356816 is about 3515.2263085042. The cubic root of 12356816 is about 231.1899014997.

The spelling of 12356816 in words is "twelve million, three hundred fifty-six thousand, eight hundred sixteen".