12189480 has 64 divisors (see below), whose sum is σ = 36858240. Its totient is φ = 3224832.

The previous prime is 12189473. The next prime is 12189491. The reversal of 12189480 is 8498121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18517 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (575910).

Almost surely, 2^12189480 is an apocalyptic number.

12189480 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 12189480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18429120).

12189480 is an abundant number, since it is smaller than the sum of its proper divisors (24668760).

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

12189480 is a wasteful number, since it uses less digits than its factorization.

12189480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 12189480 is about 3491.3435809155. The cubic root of 12189480 is about 230.1415637641.

The spelling of 12189480 in words is "twelve million, one hundred eighty-nine thousand, four hundred eighty".