9731728 has 20 divisors (see below), whose sum is σ = 19003248. Its totient is φ = 4827680.

The previous prime is 9731713. The next prime is 9731747. The reversal of 9731728 is 8271379.

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 in 3 ways as a sum of consecutive naturals, for example, 226 + ... + 4417.

Almost surely, 2^9731728 is an apocalyptic number.

It is an amenable number.

9731728 is a deficient number, since it is larger than the sum of its proper divisors (9271520).

9731728 is a wasteful number, since it uses less digits than its factorization.

9731728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782 (or 4776 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 9731728 is about 3119.5717654832. The cubic root of 9731728 is about 213.4993976074.

It can be divided in two parts, 973 and 1728, that added together give a triangular number (2701 = T₇₃).

The spelling of 9731728 in words is "nine million, seven hundred thirty-one thousand, seven hundred twenty-eight".