12872320 has 32 divisors (see below), whose sum is σ = 30774420. Its totient is φ = 5148672.

The previous prime is 12872311. The next prime is 12872333. The reversal of 12872320 is 2327821.

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 1420864 = 3384^2 + 1192^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9417 + ... + 10696.

Almost surely, 2^12872320 is an apocalyptic number.

12872320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12872320 is an abundant number, since it is smaller than the sum of its proper divisors (17902100).

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

12872320 is an equidigital number, since it uses as much as digits as its factorization.

12872320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132 (or 20120 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 12872320 is about 3587.8015552703. The cubic root of 12872320 is about 234.3611439512.

The spelling of 12872320 in words is "twelve million, eight hundred seventy-two thousand, three hundred twenty".