11991186 has 16 divisors (see below), whose sum is σ = 26647200. Its totient is φ = 3997044.

The previous prime is 11991167. The next prime is 11991209. The reversal of 11991186 is 68119911.

It is a self number, because there is not a number n which added to its sum of digits gives 11991186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110976 + ... + 111083.

It is an arithmetic number, because the mean of its divisors is an integer number (1665450).

Almost surely, 2^11991186 is an apocalyptic number.

11991186 is an abundant number, since it is smaller than the sum of its proper divisors (14656014).

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

11991186 is a wasteful number, since it uses less digits than its factorization.

11991186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222070 (or 222064 counting only the distinct ones).

The product of its digits is 3888, while the sum is 36.

The square root of 11991186 is about 3462.8291901276. The cubic root of 11991186 is about 228.8867819407.

The spelling of 11991186 in words is "eleven million, nine hundred ninety-one thousand, one hundred eighty-six".