28259361209 has 2 divisors, whose sum is σ = 28259361210. Its totient is φ = 28259361208.

The previous prime is 28259361191. The next prime is 28259361227. The reversal of 28259361209 is 90216395282.

It is a balanced prime because it is at equal distance from previous prime (28259361191) and next prime (28259361227).

It can be written as a sum of positive squares in only one way, i.e., 15832685584 + 12426675625 = 125828^2 + 111475^2 .

It is a cyclic number.

It is not a de Polignac number, because 28259361209 - 2²⁰ = 28258312633 is a prime.

It is not a weakly prime, because it can be changed into another prime (28259361289) 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, 14129680604 + 14129680605.

It is an arithmetic number, because the mean of its divisors is an integer number (14129680605).

Almost surely, 2^28259361209 is an apocalyptic number.

It is an amenable number.

28259361209 is a deficient number, since it is larger than the sum of its proper divisors (1).

28259361209 is an equidigital number, since it uses as much as digits as its factorization.

28259361209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 28259361209 in words is "twenty-eight billion, two hundred fifty-nine million, three hundred sixty-one thousand, two hundred nine".