12189700 has 36 divisors (see below), whose sum is σ = 26803840. Its totient is φ = 4811040.

The previous prime is 12189677. The next prime is 12189703. The reversal of 12189700 is 798121.

It is not an unprimeable number, because it can be changed into a prime (12189703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7129 + ... + 8671.

Almost surely, 2^12189700 is an apocalyptic number.

12189700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13401920).

12189700 is an abundant number, since it is smaller than the sum of its proper divisors (14614140).

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

12189700 is a wasteful number, since it uses less digits than its factorization.

12189700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 12189700 is about 3491.3750872686. The cubic root of 12189700 is about 230.1429483142.

The spelling of 12189700 in words is "twelve million, one hundred eighty-nine thousand, seven hundred".