28858885717 has 2 divisors, whose sum is σ = 28858885718. Its totient is φ = 28858885716.

The previous prime is 28858885691. The next prime is 28858885751. The reversal of 28858885717 is 71758885882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19659965796 + 9198919921 = 140214^2 + 95911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28858885717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28858883717) 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, 14429442858 + 14429442859.

It is an arithmetic number, because the mean of its divisors is an integer number (14429442859).

Almost surely, 2^28858885717 is an apocalyptic number.

It is an amenable number.

28858885717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28858885717 is an equidigital number, since it uses as much as digits as its factorization.

28858885717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80281600, while the sum is 67.

The spelling of 28858885717 in words is "twenty-eight billion, eight hundred fifty-eight million, eight hundred eighty-five thousand, seven hundred seventeen".