12310728 has 64 divisors (see below), whose sum is σ = 32102400. Its totient is φ = 3931200.

The previous prime is 12310721. The next prime is 12310733. The reversal of 12310728 is 82701321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12310698 and 12310707.

It is not an unprimeable number, because it can be changed into a prime (12310721) 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, 81453 + ... + 81603.

It is an arithmetic number, because the mean of its divisors is an integer number (501600).

Almost surely, 2^12310728 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 12310728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16051200).

12310728 is an abundant number, since it is smaller than the sum of its proper divisors (19791672).

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

12310728 is a wasteful number, since it uses less digits than its factorization.

12310728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12310728 is about 3508.6647032739. The cubic root of 12310728 is about 230.9021155341.

The spelling of 12310728 in words is "twelve million, three hundred ten thousand, seven hundred twenty-eight".