12880720 has 20 divisors (see below), whose sum is σ = 29947860. Its totient is φ = 5152256.

The previous prime is 12880711. The next prime is 12880723. The reversal of 12880720 is 2708821.

It can be written as a sum of positive squares in 2 ways, for example, as 1617984 + 11262736 = 1272^2 + 3356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80425 + ... + 80584.

It is an arithmetic number, because the mean of its divisors is an integer number (1497393).

Almost surely, 2^12880720 is an apocalyptic number.

12880720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12880720 is an abundant number, since it is smaller than the sum of its proper divisors (17067140).

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

12880720 is a wasteful number, since it uses less digits than its factorization.

12880720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161022 (or 161016 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 12880720 is about 3588.9719976617. The cubic root of 12880720 is about 234.4121113382.

The spelling of 12880720 in words is "twelve million, eight hundred eighty thousand, seven hundred twenty".