8929728 has 84 divisors (see below), whose sum is σ = 26349960. Its totient is φ = 2889216.

The previous prime is 8929673. The next prime is 8929733. The reversal of 8929728 is 8279298.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21103 + ... + 21521.

It is an arithmetic number, because the mean of its divisors is an integer number (313690).

Almost surely, 2^8929728 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 8929728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13174980).

8929728 is an abundant number, since it is smaller than the sum of its proper divisors (17420232).

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

8929728 is a wasteful number, since it uses less digits than its factorization.

8929728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 461 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 8929728 is about 2988.2650484855. The cubic root of 8929728 is about 207.4655906556.

The spelling of 8929728 in words is "eight million, nine hundred twenty-nine thousand, seven hundred twenty-eight".