12185988 has 12 divisors (see below), whose sum is σ = 28434000. Its totient is φ = 4061992.

The previous prime is 12185981. The next prime is 12186001. The reversal of 12185988 is 88958121.

12185988 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12185988² = 296996607072288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12185981) 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, 507738 + ... + 507761.

It is an arithmetic number, because the mean of its divisors is an integer number (2369500).

Almost surely, 2^12185988 is an apocalyptic number.

It is an amenable number.

12185988 is an abundant number, since it is smaller than the sum of its proper divisors (16248012).

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

12185988 is a wasteful number, since it uses less digits than its factorization.

12185988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015506 (or 1015504 counting only the distinct ones).

The product of its digits is 46080, while the sum is 42.

The square root of 12185988 is about 3490.8434510874. The cubic root of 12185988 is about 230.1195849458.

The spelling of 12185988 in words is "twelve million, one hundred eighty-five thousand, nine hundred eighty-eight".