9728784 has 60 divisors (see below), whose sum is σ = 29327116. Its totient is φ = 2992896.

The previous prime is 9728773. The next prime is 9728791. The reversal of 9728784 is 4878279.

It can be written as a sum of positive squares in 2 ways, for example, as 2822400 + 6906384 = 1680^2 + 2628^2 .

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, 727 + ... + 4470.

Almost surely, 2^9728784 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 9728784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14663558).

9728784 is an abundant number, since it is smaller than the sum of its proper divisors (19598332).

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

9728784 is a wasteful number, since it uses less digits than its factorization.

9728784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224 (or 5215 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 9728784 is about 3119.0998701548. The cubic root of 9728784 is about 213.4778664665.

The spelling of 9728784 in words is "nine million, seven hundred twenty-eight thousand, seven hundred eighty-four".