12831328 has 48 divisors (see below), whose sum is σ = 27125280. Its totient is φ = 5953536.

The previous prime is 12831317. The next prime is 12831331. The reversal of 12831328 is 82313821.

It is a junction number, because it is equal to n+sod(n) for n = 12831296 and 12831305.

It is a congruent number.

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, 55918 + ... + 56146.

It is an arithmetic number, because the mean of its divisors is an integer number (565110).

Almost surely, 2^12831328 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 12831328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13562640).

12831328 is an abundant number, since it is smaller than the sum of its proper divisors (14293952).

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

12831328 is a wasteful number, since it uses less digits than its factorization.

12831328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 351 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 12831328 is about 3582.0843094489. The cubic root of 12831328 is about 234.1121044651.

The spelling of 12831328 in words is "twelve million, eight hundred thirty-one thousand, three hundred twenty-eight".