12816576 has 56 divisors (see below), whose sum is σ = 37683440. Its totient is φ = 4271616.

The previous prime is 12816569. The next prime is 12816577. The reversal of 12816576 is 67561821.

12816576 is a `hidden beast` number, since 1 + 2 + 81 + 6 + 576 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12816576.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981 + ... + 5436.

Almost surely, 2^12816576 is an apocalyptic number.

12816576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12816576 is an abundant number, since it is smaller than the sum of its proper divisors (24866864).

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

12816576 is an equidigital number, since it uses as much as digits as its factorization.

12816576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438 (or 7422 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12816576 is about 3580.0245809212. The cubic root of 12816576 is about 234.0223515796.

The spelling of 12816576 in words is "twelve million, eight hundred sixteen thousand, five hundred seventy-six".