28342243289 has 2 divisors, whose sum is σ = 28342243290. Its totient is φ = 28342243288.

The previous prime is 28342243217. The next prime is 28342243301. The reversal of 28342243289 is 98234224382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24858882889 + 3483360400 = 157667^2 + 59020^2 .

It is a cyclic number.

It is not a de Polignac number, because 28342243289 - 2¹² = 28342239193 is a prime.

It is not a weakly prime, because it can be changed into another prime (28342245289) by changing a digit.

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 as a sum of consecutive naturals, namely, 14171121644 + 14171121645.

It is an arithmetic number, because the mean of its divisors is an integer number (14171121645).

Almost surely, 2^28342243289 is an apocalyptic number.

It is an amenable number.

28342243289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28342243289 is an equidigital number, since it uses as much as digits as its factorization.

28342243289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1327104, while the sum is 47.

The spelling of 28342243289 in words is "twenty-eight billion, three hundred forty-two million, two hundred forty-three thousand, two hundred eighty-nine".