12919988 has 12 divisors (see below), whose sum is σ = 22818180. Its totient is φ = 6400512.

The previous prime is 12919987. The next prime is 12920003. The reversal of 12919988 is 88991921.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 1373584 = 3398^2 + 1172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12919987) 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, 14381 + ... + 15252.

It is an arithmetic number, because the mean of its divisors is an integer number (1901515).

Almost surely, 2^12919988 is an apocalyptic number.

It is an amenable number.

12919988 is a deficient number, since it is larger than the sum of its proper divisors (9898192).

12919988 is a wasteful number, since it uses less digits than its factorization.

12919988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29746 (or 29744 counting only the distinct ones).

The product of its digits is 93312, while the sum is 47.

The square root of 12919988 is about 3594.4384818772. The cubic root of 12919988 is about 234.6500782796.

The spelling of 12919988 in words is "twelve million, nine hundred nineteen thousand, nine hundred eighty-eight".