12389328 has 160 divisors (see below), whose sum is σ = 43211520. Its totient is φ = 3317760.

The previous prime is 12389323. The next prime is 12389329. The reversal of 12389328 is 82398321.

It is a happy number.

12389328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12389292 and 12389301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12389323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51288 + ... + 51528.

It is an arithmetic number, because the mean of its divisors is an integer number (270072).

Almost surely, 2^12389328 is an apocalyptic number.

12389328 is a gapful number since it is divisible by the number (18) 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 12389328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21605760).

12389328 is an abundant number, since it is smaller than the sum of its proper divisors (30822192).

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

12389328 is a wasteful number, since it uses less digits than its factorization.

12389328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 270 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 12389328 is about 3519.8477239790. The cubic root of 12389328 is about 231.3924850651.

The spelling of 12389328 in words is "twelve million, three hundred eighty-nine thousand, three hundred twenty-eight".