12928280 has 16 divisors (see below), whose sum is σ = 29088720. Its totient is φ = 5171296.

The previous prime is 12928273. The next prime is 12928297. The reversal of 12928280 is 8282921.

It is a congruent number.

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, 161564 + ... + 161643.

It is an arithmetic number, because the mean of its divisors is an integer number (1818045).

Almost surely, 2^12928280 is an apocalyptic number.

12928280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12928280 is an abundant number, since it is smaller than the sum of its proper divisors (16160440).

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

12928280 is a wasteful number, since it uses less digits than its factorization.

12928280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323218 (or 323214 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12928280 is about 3595.5917454572. The cubic root of 12928280 is about 234.7002667252.

The spelling of 12928280 in words is "twelve million, nine hundred twenty-eight thousand, two hundred eighty".