8668728 has 64 divisors (see below), whose sum is σ = 24480000. Its totient is φ = 2841696.

The previous prime is 8668721. The next prime is 8668739. The reversal of 8668728 is 8278668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8668721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14173 + ... + 14771.

It is an arithmetic number, because the mean of its divisors is an integer number (382500).

Almost surely, 2^8668728 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 8668728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12240000).

8668728 is an abundant number, since it is smaller than the sum of its proper divisors (15811272).

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

8668728 is a wasteful number, since it uses less digits than its factorization.

8668728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 671 counting only the distinct ones).

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

The square root of 8668728 is about 2944.2703680199. The cubic root of 8668728 is about 205.4242888020.

The spelling of 8668728 in words is "eight million, six hundred sixty-eight thousand, seven hundred twenty-eight".