12686928 has 40 divisors (see below), whose sum is σ = 33399648. Its totient is φ = 4148352.

The previous prime is 12686923. The next prime is 12686939. The reversal of 12686928 is 82968621.

It is a self number, because there is not a number n which added to its sum of digits gives 12686928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12686923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51 + ... + 5037.

Almost surely, 2^12686928 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 12686928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16699824).

12686928 is an abundant number, since it is smaller than the sum of its proper divisors (20712720).

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

12686928 is a wasteful number, since it uses less digits than its factorization.

12686928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051 (or 5045 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 12686928 is about 3561.8714182295. The cubic root of 12686928 is about 233.2305797001.

The spelling of 12686928 in words is "twelve million, six hundred eighty-six thousand, nine hundred twenty-eight".