12189632 has 126 divisors (see below), whose sum is σ = 31793688. Its totient is φ = 4612608.

The previous prime is 12189631. The next prime is 12189647. The reversal of 12189632 is 23698121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189631) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 529973 + ... + 529995.

Almost surely, 2^12189632 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 12189632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15896844).

12189632 is an abundant number, since it is smaller than the sum of its proper divisors (19604056).

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

12189632 is a wasteful number, since it uses less digits than its factorization.

12189632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 45 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 12189632 is about 3491.3653489717. The cubic root of 12189632 is about 230.1425203641.

It can be divided in two parts, 12189 and 632, that added together give a palindrome (12821).

The spelling of 12189632 in words is "twelve million, one hundred eighty-nine thousand, six hundred thirty-two".