12186990 has 32 divisors (see below), whose sum is σ = 32499360. Its totient is φ = 3249792.

The previous prime is 12186971. The next prime is 12186997. The reversal of 12186990 is 9968121.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12186997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22299 + ... + 22838.

It is an arithmetic number, because the mean of its divisors is an integer number (1015605).

Almost surely, 2^12186990 is an apocalyptic number.

12186990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12186990 is an abundant number, since it is smaller than the sum of its proper divisors (20312370).

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

12186990 is a wasteful number, since it uses less digits than its factorization.

12186990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45153 (or 45147 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12186990 is about 3490.9869664609. The cubic root of 12186990 is about 230.1258920122.

The spelling of 12186990 in words is "twelve million, one hundred eighty-six thousand, nine hundred ninety".