12188664 has 64 divisors (see below), whose sum is σ = 34365600. Its totient is φ = 4002048.

The previous prime is 12188663. The next prime is 12188669. The reversal of 12188664 is 46688121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15382 + ... + 16154.

Almost surely, 2^12188664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12188664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17182800).

12188664 is an abundant number, since it is smaller than the sum of its proper divisors (22176936).

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

12188664 is a wasteful number, since it uses less digits than its factorization.

12188664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 851 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 12188664 is about 3491.2267185045. The cubic root of 12188664 is about 230.1364281962.

The spelling of 12188664 in words is "twelve million, one hundred eighty-eight thousand, six hundred sixty-four".