12389872 has 80 divisors (see below), whose sum is σ = 28685664. Its totient is φ = 5120000.

The previous prime is 12389833. The next prime is 12389879. The reversal of 12389872 is 27898321.

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 (12389879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122622 + ... + 122722.

Almost surely, 2^12389872 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 12389872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14342832).

12389872 is an abundant number, since it is smaller than the sum of its proper divisors (16295792).

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

12389872 is a wasteful number, since it uses less digits than its factorization.

12389872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 172 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 12389872 is about 3519.9249992010. The cubic root of 12389872 is about 231.3958717344.

The spelling of 12389872 in words is "twelve million, three hundred eighty-nine thousand, eight hundred seventy-two".