9721328 has 10 divisors (see below), whose sum is σ = 18835104. Its totient is φ = 4860656.

The previous prime is 9721319. The next prime is 9721357. The reversal of 9721328 is 8231279.

It is a junction number, because it is equal to n+sod(n) for n = 9721294 and 9721303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303776 + ... + 303807.

Almost surely, 2^9721328 is an apocalyptic number.

It is an amenable number.

9721328 is a deficient number, since it is larger than the sum of its proper divisors (9113776).

9721328 is a wasteful number, since it uses less digits than its factorization.

9721328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607591 (or 607585 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 9721328 is about 3117.9044244492. The cubic root of 9721328 is about 213.4233170744.

The spelling of 9721328 in words is "nine million, seven hundred twenty-one thousand, three hundred twenty-eight".