12129388 has 12 divisors (see below), whose sum is σ = 21517720. Its totient is φ = 5981472.

The previous prime is 12129379. The next prime is 12129407. The reversal of 12129388 is 88392121.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 20478 + ... + 21061.

Almost surely, 2^12129388 is an apocalyptic number.

It is an amenable number.

12129388 is a deficient number, since it is larger than the sum of its proper divisors (9388332).

12129388 is a wasteful number, since it uses less digits than its factorization.

12129388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41616 (or 41614 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 12129388 is about 3482.7270923803. The cubic root of 12129388 is about 229.7627547353.

The spelling of 12129388 in words is "twelve million, one hundred twenty-nine thousand, three hundred eighty-eight".