12909980 has 12 divisors (see below), whose sum is σ = 27111000. Its totient is φ = 5163984.

The previous prime is 12909973. The next prime is 12909989. The reversal of 12909980 is 8990921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909989) 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, 322730 + ... + 322769.

It is an arithmetic number, because the mean of its divisors is an integer number (2259250).

Almost surely, 2^12909980 is an apocalyptic number.

12909980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12909980 is an abundant number, since it is smaller than the sum of its proper divisors (14201020).

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

12909980 is a wasteful number, since it uses less digits than its factorization.

12909980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645508 (or 645506 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 12909980 is about 3593.0460614916. The cubic root of 12909980 is about 234.5894749053.

The spelling of 12909980 in words is "twelve million, nine hundred nine thousand, nine hundred eighty".