28063984889 has 2 divisors, whose sum is σ = 28063984890. Its totient is φ = 28063984888.

The previous prime is 28063984853. The next prime is 28063984933. The reversal of 28063984889 is 98848936082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25859212864 + 2204772025 = 160808^2 + 46955^2 .

It is a cyclic number.

It is not a de Polignac number, because 28063984889 - 2²⁰ = 28062936313 is a prime.

It is not a weakly prime, because it can be changed into another prime (28063974889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14031992444 + 14031992445.

It is an arithmetic number, because the mean of its divisors is an integer number (14031992445).

Almost surely, 2^28063984889 is an apocalyptic number.

It is an amenable number.

28063984889 is a deficient number, since it is larger than the sum of its proper divisors (1).

28063984889 is an equidigital number, since it uses as much as digits as its factorization.

28063984889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47775744, while the sum is 65.

The spelling of 28063984889 in words is "twenty-eight billion, sixty-three million, nine hundred eighty-four thousand, eight hundred eighty-nine".