9728863225 has 9 divisors (see below), whose sum is σ = 12064401967. Its totient is φ = 7782696040.

The previous prime is 9728863187. The next prime is 9728863231. The reversal of 9728863225 is 5223688279.

The square root of 9728863225 is 98635.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3502390761 + 6226472464 = 59181^2 + 78908^2 .

It is not a de Polignac number, because 9728863225 - 2⁷ = 9728863097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 483312 + ... + 503038.

Almost surely, 2^9728863225 is an apocalyptic number.

9728863225 is the 98635-th square number.

9728863225 is the 49318-th centered octagonal number.

It is an amenable number.

9728863225 is a deficient number, since it is larger than the sum of its proper divisors (2335538742).

9728863225 is an frugal number, since it uses more digits than its factorization.

9728863225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39464 (or 19732 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The cubic root of 9728863225 is about 2134.7844594075.

The spelling of 9728863225 in words is "nine billion, seven hundred twenty-eight million, eight hundred sixty-three thousand, two hundred twenty-five".