28395685793 has 2 divisors, whose sum is σ = 28395685794. Its totient is φ = 28395685792.

The previous prime is 28395685771. The next prime is 28395685861. The reversal of 28395685793 is 39758659382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25226333584 + 3169352209 = 158828^2 + 56297^2 .

It is a cyclic number.

It is not a de Polignac number, because 28395685793 - 2¹⁸ = 28395423649 is a prime.

It is not a weakly prime, because it can be changed into another prime (28395685693) 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, 14197842896 + 14197842897.

It is an arithmetic number, because the mean of its divisors is an integer number (14197842897).

Almost surely, 2^28395685793 is an apocalyptic number.

It is an amenable number.

28395685793 is a deficient number, since it is larger than the sum of its proper divisors (1).

28395685793 is an equidigital number, since it uses as much as digits as its factorization.

28395685793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97977600, while the sum is 65.

The spelling of 28395685793 in words is "twenty-eight billion, three hundred ninety-five million, six hundred eighty-five thousand, seven hundred ninety-three".