28107872869 has 2 divisors, whose sum is σ = 28107872870. Its totient is φ = 28107872868.

The previous prime is 28107872857. The next prime is 28107872873. The reversal of 28107872869 is 96827870182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22241844769 + 5866028100 = 149137^2 + 76590^2 .

It is a cyclic number.

It is not a de Polignac number, because 28107872869 - 2²⁹ = 27571001957 is a prime.

It is a super-2 number, since 2×28107872869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28107879869) 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, 14053936434 + 14053936435.

It is an arithmetic number, because the mean of its divisors is an integer number (14053936435).

Almost surely, 2^28107872869 is an apocalyptic number.

It is an amenable number.

28107872869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28107872869 is an equidigital number, since it uses as much as digits as its factorization.

28107872869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 28107872869 in words is "twenty-eight billion, one hundred seven million, eight hundred seventy-two thousand, eight hundred sixty-nine".