12790280 has 16 divisors (see below), whose sum is σ = 28778220. Its totient is φ = 5116096.

The previous prime is 12790241. The next prime is 12790301. The reversal of 12790280 is 8209721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12432676 + 357604 = 3526^2 + 598^2 .

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, 159839 + ... + 159918.

Almost surely, 2^12790280 is an apocalyptic number.

12790280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12790280 is an abundant number, since it is smaller than the sum of its proper divisors (15987940).

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

12790280 is a wasteful number, since it uses less digits than its factorization.

12790280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319768 (or 319764 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 12790280 is about 3576.3500947195. The cubic root of 12790280 is about 233.8621927036.

The spelling of 12790280 in words is "twelve million, seven hundred ninety thousand, two hundred eighty".