12189450 has 192 divisors, whose sum is σ = 39997440. Its totient is φ = 2384640.

The previous prime is 12189449. The next prime is 12189461. The reversal of 12189450 is 5498121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 259327 + ... + 259373.

It is an arithmetic number, because the mean of its divisors is an integer number (208320).

Almost surely, 2^12189450 is an apocalyptic number.

12189450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19998720).

12189450 is an abundant number, since it is smaller than the sum of its proper divisors (27807990).

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

12189450 is a wasteful number, since it uses less digits than its factorization.

12189450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 12189450 is about 3491.3392845726. The cubic root of 12189450 is about 230.1413749605.

The spelling of 12189450 in words is "twelve million, one hundred eighty-nine thousand, four hundred fifty".