12188900 has 18 divisors (see below), whose sum is σ = 26450130. Its totient is φ = 4875520.

The previous prime is 12188863. The next prime is 12188927. The reversal of 12188900 is 988121.

It can be written as a sum of positive squares in 3 ways, for example, as 92416 + 12096484 = 304^2 + 3478^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60845 + ... + 61044.

Almost surely, 2^12188900 is an apocalyptic number.

12188900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12188900 is an abundant number, since it is smaller than the sum of its proper divisors (14261230).

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

12188900 is a wasteful number, since it uses less digits than its factorization.

12188900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121903 (or 121896 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 12188900 is about 3491.2605173490. The cubic root of 12188900 is about 230.1379135065.

The spelling of 12188900 in words is "twelve million, one hundred eighty-eight thousand, nine hundred".