12816648 has 48 divisors (see below), whose sum is σ = 37384620. Its totient is φ = 3943296.

The previous prime is 12816607. The next prime is 12816667. The reversal of 12816648 is 84661821.

12816648 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 6 + 648 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12404484 + 412164 = 3522^2 + 642^2 .

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5911 + ... + 7782.

Almost surely, 2^12816648 is an apocalyptic number.

12816648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12816648 is an abundant number, since it is smaller than the sum of its proper divisors (24567972).

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

12816648 is a wasteful number, since it uses less digits than its factorization.

12816648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13718 (or 13711 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 12816648 is about 3580.0346367040. The cubic root of 12816648 is about 234.0227898032.

The spelling of 12816648 in words is "twelve million, eight hundred sixteen thousand, six hundred forty-eight".