12990880 has 72 divisors (see below), whose sum is σ = 35723268. Its totient is φ = 4451328.

The previous prime is 12990871. The next prime is 12990899. The reversal of 12990880 is 8809921.

It can be written as a sum of positive squares in 2 ways, for example, as 12645136 + 345744 = 3556^2 + 588^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7012 + ... + 8668.

Almost surely, 2^12990880 is an apocalyptic number.

12990880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12990880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17861634).

12990880 is an abundant number, since it is smaller than the sum of its proper divisors (22732388).

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

12990880 is a wasteful number, since it uses less digits than its factorization.

12990880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 12990880 is about 3604.2863371269. The cubic root of 12990880 is about 235.0784708517.

The spelling of 12990880 in words is "twelve million, nine hundred ninety thousand, eight hundred eighty".