12188140 has 12 divisors (see below), whose sum is σ = 25595136. Its totient is φ = 4875248.

The previous prime is 12188123. The next prime is 12188159. The reversal of 12188140 is 4188121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304684 + ... + 304723.

It is an arithmetic number, because the mean of its divisors is an integer number (2132928).

Almost surely, 2^12188140 is an apocalyptic number.

12188140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12188140 is an abundant number, since it is smaller than the sum of its proper divisors (13406996).

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

12188140 is a wasteful number, since it uses less digits than its factorization.

12188140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609416 (or 609414 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 12188140 is about 3491.1516724428. The cubic root of 12188140 is about 230.1331302351.

The spelling of 12188140 in words is "twelve million, one hundred eighty-eight thousand, one hundred forty".