28303840289 has 2 divisors, whose sum is σ = 28303840290. Its totient is φ = 28303840288.

The previous prime is 28303840283. The next prime is 28303840337. The reversal of 28303840289 is 98204830382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25402940689 + 2900899600 = 159383^2 + 53860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28303840289 is a prime.

It is a super-2 number, since 2×28303840289² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28303840283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14151920144 + 14151920145.

It is an arithmetic number, because the mean of its divisors is an integer number (14151920145).

Almost surely, 2^28303840289 is an apocalyptic number.

It is an amenable number.

28303840289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28303840289 is an equidigital number, since it uses as much as digits as its factorization.

28303840289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 28303840289 in words is "twenty-eight billion, three hundred three million, eight hundred forty thousand, two hundred eighty-nine".