9728028650 has 24 divisors (see below), whose sum is σ = 18109114380. Its totient is φ = 3887989760.

The previous prime is 9728028647. The next prime is 9728028689. The reversal of 9728028650 is 568208279.

It can be written as a sum of positive squares in 6 ways, for example, as 4974339841 + 4753688809 = 70529^2 + 68947^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9728028595 and 9728028604.

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, 19085 + ... + 140784.

Almost surely, 2^9728028650 is an apocalyptic number.

9728028650 is a deficient number, since it is larger than the sum of its proper divisors (8381085730).

9728028650 is a wasteful number, since it uses less digits than its factorization.

9728028650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161098 (or 161093 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 9728028650 is about 98630.7692862628. The cubic root of 9728028650 is about 2134.7234146363.

The spelling of 9728028650 in words is "nine billion, seven hundred twenty-eight million, twenty-eight thousand, six hundred fifty".