12857980 has 12 divisors (see below), whose sum is σ = 27001800. Its totient is φ = 5143184.

The previous prime is 12857953. The next prime is 12857983. The reversal of 12857980 is 8975821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321430 + ... + 321469.

It is an arithmetic number, because the mean of its divisors is an integer number (2250150).

Almost surely, 2^12857980 is an apocalyptic number.

12857980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12857980 is an abundant number, since it is smaller than the sum of its proper divisors (14143820).

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

12857980 is a wasteful number, since it uses less digits than its factorization.

12857980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642908 (or 642906 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 12857980 is about 3585.8025600973. The cubic root of 12857980 is about 234.2740840803.

The spelling of 12857980 in words is "twelve million, eight hundred fifty-seven thousand, nine hundred eighty".