12791980 has 12 divisors (see below), whose sum is σ = 26863200. Its totient is φ = 5116784.

The previous prime is 12791969. The next prime is 12791981. The reversal of 12791980 is 8919721.

It is not an unprimeable number, because it can be changed into a prime (12791981) 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, 319780 + ... + 319819.

It is an arithmetic number, because the mean of its divisors is an integer number (2238600).

Almost surely, 2^12791980 is an apocalyptic number.

12791980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12791980 is an abundant number, since it is smaller than the sum of its proper divisors (14071220).

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

12791980 is a wasteful number, since it uses less digits than its factorization.

12791980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639608 (or 639606 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 12791980 is about 3576.5877593036. The cubic root of 12791980 is about 233.8725533868.

The spelling of 12791980 in words is "twelve million, seven hundred ninety-one thousand, nine hundred eighty".