12816280 has 32 divisors (see below), whose sum is σ = 28947600. Its totient is φ = 5106816.

The previous prime is 12816277. The next prime is 12816337. The reversal of 12816280 is 8261821.

12816280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14491 + ... + 15349.

Almost surely, 2^12816280 is an apocalyptic number.

12816280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12816280 is an abundant number, since it is smaller than the sum of its proper divisors (16131320).

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

12816280 is a wasteful number, since it uses less digits than its factorization.

12816280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 12816280 is about 3579.9832401842. The cubic root of 12816280 is about 234.0205499765.

The spelling of 12816280 in words is "twelve million, eight hundred sixteen thousand, two hundred eighty".