28302919302809 has 2 divisors, whose sum is σ = 28302919302810. Its totient is φ = 28302919302808.

The previous prime is 28302919302781. The next prime is 28302919302841. The reversal of 28302919302809 is 90820391920382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27410952389209 + 891966913600 = 5235547^2 + 944440^2 .

It is a cyclic number.

It is not a de Polignac number, because 28302919302809 - 2⁴⁰ = 27203407675033 is a prime.

It is a super-2 number, since 2×28302919302809² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28302919302869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14151459651404 + 14151459651405.

It is an arithmetic number, because the mean of its divisors is an integer number (14151459651405).

Almost surely, 2^{28302919302809} is an apocalyptic number.

It is an amenable number.

28302919302809 is a deficient number, since it is larger than the sum of its proper divisors (1).

28302919302809 is an equidigital number, since it uses as much as digits as its factorization.

28302919302809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 28302919302809 in words is "twenty-eight trillion, three hundred two billion, nine hundred nineteen million, three hundred two thousand, eight hundred nine".