28342916309 has 2 divisors, whose sum is σ = 28342916310. Its totient is φ = 28342916308.

The previous prime is 28342916293. The next prime is 28342916317. The reversal of 28342916309 is 90361924382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27865624900 + 477291409 = 166930^2 + 21847^2 .

It is a cyclic number.

It is not a de Polignac number, because 28342916309 - 2⁴ = 28342916293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28342916359) 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, 14171458154 + 14171458155.

It is an arithmetic number, because the mean of its divisors is an integer number (14171458155).

Almost surely, 2^28342916309 is an apocalyptic number.

It is an amenable number.

28342916309 is a deficient number, since it is larger than the sum of its proper divisors (1).

28342916309 is an equidigital number, since it uses as much as digits as its factorization.

28342916309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 28342916309 in words is "twenty-eight billion, three hundred forty-two million, nine hundred sixteen thousand, three hundred nine".