12756328 has 32 divisors (see below), whose sum is σ = 25943400. Its totient is φ = 5845248.

The previous prime is 12756319. The next prime is 12756343. The reversal of 12756328 is 82365721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9229444 + 3526884 = 3038^2 + 1878^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12756293 and 12756302.

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, 17638 + ... + 18346.

Almost surely, 2^12756328 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 12756328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12971700).

12756328 is an abundant number, since it is smaller than the sum of its proper divisors (13187072).

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

12756328 is a wasteful number, since it uses less digits than its factorization.

12756328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 897 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 12756328 is about 3571.6002015903. The cubic root of 12756328 is about 233.6550790401.

The spelling of 12756328 in words is "twelve million, seven hundred fifty-six thousand, three hundred twenty-eight".