9726728 has 32 divisors (see below), whose sum is σ = 20100960. Its totient is φ = 4375680.

The previous prime is 9726713. The next prime is 9726733. The reversal of 9726728 is 8276279.

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, 8900 + ... + 9932.

It is an arithmetic number, because the mean of its divisors is an integer number (628155).

Almost surely, 2^9726728 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 9726728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10050480).

9726728 is an abundant number, since it is smaller than the sum of its proper divisors (10374232).

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

9726728 is a wasteful number, since it uses less digits than its factorization.

9726728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1153 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 9726728 is about 3118.7702704752. The cubic root of 9726728 is about 213.4628271970.

The spelling of 9726728 in words is "nine million, seven hundred twenty-six thousand, seven hundred twenty-eight".