8686728 has 96 divisors (see below), whose sum is σ = 25608960. Its totient is φ = 2649600.

The previous prime is 8686721. The next prime is 8686729. The reversal of 8686728 is 8276868.

It is not an unprimeable number, because it can be changed into a prime (8686721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57453 + ... + 57603.

It is an arithmetic number, because the mean of its divisors is an integer number (266760).

Almost surely, 2^8686728 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 8686728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12804480).

8686728 is an abundant number, since it is smaller than the sum of its proper divisors (16922232).

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

8686728 is a wasteful number, since it uses less digits than its factorization.

8686728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 220 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 8686728 is about 2947.3255673576. The cubic root of 8686728 is about 205.5663735020.

The spelling of 8686728 in words is "eight million, six hundred eighty-six thousand, seven hundred twenty-eight".