728289322273 has 12 divisors (see below), whose sum is σ = 773967592332. Its totient is φ = 685167303680.

The previous prime is 728289322217. The next prime is 728289322283. The reversal of 728289322273 is 372223982827.

It can be written as a sum of positive squares in 6 ways, for example, as 133650929889 + 594638392384 = 365583^2 + 771128^2 .

It is a de Polignac number, because none of the positive numbers 2^k-728289322273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728289322283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189261 + ... + 1221637.

It is an arithmetic number, because the mean of its divisors is an integer number (64497299361).

Almost surely, 2^728289322273 is an apocalyptic number.

It is an amenable number.

728289322273 is a deficient number, since it is larger than the sum of its proper divisors (45678270059).

728289322273 is a wasteful number, since it uses less digits than its factorization.

728289322273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034852 (or 1034835 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 728289322273 in words is "seven hundred twenty-eight billion, two hundred eighty-nine million, three hundred twenty-two thousand, two hundred seventy-three".