12999980 has 24 divisors (see below), whose sum is σ = 31200288. Its totient is φ = 4457088.

The previous prime is 12999979. The next prime is 12999983. The reversal of 12999980 is 8999921.

12999980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12999983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46289 + ... + 46568.

It is an arithmetic number, because the mean of its divisors is an integer number (1300012).

Almost surely, 2^12999980 is an apocalyptic number.

12999980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12999980 is an abundant number, since it is smaller than the sum of its proper divisors (18200308).

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

12999980 is a wasteful number, since it uses less digits than its factorization.

12999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92873 (or 92871 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 12999980 is about 3605.5485019619. The cubic root of 12999980 is about 235.1333481907.

The spelling of 12999980 in words is "twelve million, nine hundred ninety-nine thousand, nine hundred eighty".