8499728 has 20 divisors (see below), whose sum is σ = 17437500. Its totient is φ = 3999744.

The previous prime is 8499727. The next prime is 8499731. The reversal of 8499728 is 8279948.

It can be written as a sum of positive squares in 2 ways, for example, as 6091024 + 2408704 = 2468^2 + 1552^2 .

It is not an unprimeable number, because it can be changed into a prime (8499727) 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 3 ways as a sum of consecutive naturals, for example, 15353 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (871875).

Almost surely, 2^8499728 is an apocalyptic number.

It is an amenable number.

8499728 is an abundant number, since it is smaller than the sum of its proper divisors (8937772).

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

8499728 is a wasteful number, since it uses less digits than its factorization.

8499728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31274 (or 31268 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 8499728 is about 2915.4292994343. The cubic root of 8499728 is about 204.0805781899.

The spelling of 8499728 in words is "eight million, four hundred ninety-nine thousand, seven hundred twenty-eight".