12389920 has 48 divisors (see below), whose sum is σ = 29490048. Its totient is φ = 4919040.

The previous prime is 12389917. The next prime is 12389963. The reversal of 12389920 is 2998321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33577 + ... + 33943.

It is an arithmetic number, because the mean of its divisors is an integer number (614376).

Almost surely, 2^12389920 is an apocalyptic number.

12389920 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 12389920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14745024).

12389920 is an abundant number, since it is smaller than the sum of its proper divisors (17100128).

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

12389920 is a wasteful number, since it uses less digits than its factorization.

12389920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 12389920 is about 3519.9318175215. The cubic root of 12389920 is about 231.3961705534.

The spelling of 12389920 in words is "twelve million, three hundred eighty-nine thousand, nine hundred twenty".