8539728 has 40 divisors (see below), whose sum is σ = 22320000. Its totient is φ = 2813184.

The previous prime is 8539691. The next prime is 8539747. The reversal of 8539728 is 8279358.

It is a self number, because there is not a number n which added to its sum of digits gives 8539728.

It is a congruent number.

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, 3273 + ... + 5271.

It is an arithmetic number, because the mean of its divisors is an integer number (558000).

Almost surely, 2^8539728 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 8539728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11160000).

8539728 is an abundant number, since it is smaller than the sum of its proper divisors (13780272).

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

8539728 is a wasteful number, since it uses less digits than its factorization.

8539728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2093 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 8539728 is about 2922.2813006280. The cubic root of 8539728 is about 204.4002139491.

The spelling of 8539728 in words is "eight million, five hundred thirty-nine thousand, seven hundred twenty-eight".