9747728 has 10 divisors (see below), whose sum is σ = 18886254. Its totient is φ = 4873856.

The previous prime is 9747721. The next prime is 9747737. The reversal of 9747728 is 8277479.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 795664 = 2992^2 + 892^2 .

It is not an unprimeable number, because it can be changed into a prime (9747721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304601 + ... + 304632.

Almost surely, 2^9747728 is an apocalyptic number.

It is an amenable number.

9747728 is a deficient number, since it is larger than the sum of its proper divisors (9138526).

9747728 is a wasteful number, since it uses less digits than its factorization.

9747728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609241 (or 609235 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 9747728 is about 3122.1351668370. The cubic root of 9747728 is about 213.6163388120.

The spelling of 9747728 in words is "nine million, seven hundred forty-seven thousand, seven hundred twenty-eight".