12189072 has 40 divisors (see below), whose sum is σ = 35987776. Its totient is φ = 3482496.

The previous prime is 12189071. The next prime is 12189097. The reversal of 12189072 is 27098121.

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

It is not an unprimeable number, because it can be changed into a prime (12189071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17803 + ... + 18474.

Almost surely, 2^12189072 is an apocalyptic number.

12189072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12189072 is an abundant number, since it is smaller than the sum of its proper divisors (23798704).

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

12189072 is a wasteful number, since it uses less digits than its factorization.

12189072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36295 (or 36289 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 12189072 is about 3491.2851501990. The cubic root of 12189072 is about 230.1389960088.

The spelling of 12189072 in words is "twelve million, one hundred eighty-nine thousand, seventy-two".