728228273 has 2 divisors, whose sum is σ = 728228274. Its totient is φ = 728228272.

The previous prime is 728228243. The next prime is 728228297. The reversal of 728228273 is 372822827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704530849 + 23697424 = 26543^2 + 4868^2 .

It is a cyclic number.

It is not a de Polignac number, because 728228273 - 2¹² = 728224177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728228273.

It is not a weakly prime, because it can be changed into another prime (728228213) 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 as a sum of consecutive naturals, namely, 364114136 + 364114137.

It is an arithmetic number, because the mean of its divisors is an integer number (364114137).

Almost surely, 2^728228273 is an apocalyptic number.

It is an amenable number.

728228273 is a deficient number, since it is larger than the sum of its proper divisors (1).

728228273 is an equidigital number, since it uses as much as digits as its factorization.

728228273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 728228273 is about 26985.7049750419. The cubic root of 728228273 is about 899.6823047409.

The spelling of 728228273 in words is "seven hundred twenty-eight million, two hundred twenty-eight thousand, two hundred seventy-three".