12189886 has 4 divisors (see below), whose sum is σ = 18284832. Its totient is φ = 6094942.

The previous prime is 12189871. The next prime is 12189907. The reversal of 12189886 is 68898121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3047470 + ... + 3047473.

It is an arithmetic number, because the mean of its divisors is an integer number (4571208).

Almost surely, 2^12189886 is an apocalyptic number.

12189886 is a deficient number, since it is larger than the sum of its proper divisors (6094946).

12189886 is an equidigital number, since it uses as much as digits as its factorization.

12189886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094945.

The product of its digits is 55296, while the sum is 43.

The square root of 12189886 is about 3491.4017242363. The cubic root of 12189886 is about 230.1441188755.

The spelling of 12189886 in words is "twelve million, one hundred eighty-nine thousand, eight hundred eighty-six".