28189534469 has 2 divisors, whose sum is σ = 28189534470. Its totient is φ = 28189534468.

The previous prime is 28189534409. The next prime is 28189534489. The reversal of 28189534469 is 96443598182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24771612100 + 3417922369 = 157390^2 + 58463^2 .

It is a cyclic number.

It is not a de Polignac number, because 28189534469 - 2²⁴ = 28172757253 is a prime.

It is a super-2 number, since 2×28189534469² (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 (28189534409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14094767234 + 14094767235.

It is an arithmetic number, because the mean of its divisors is an integer number (14094767235).

Almost surely, 2^28189534469 is an apocalyptic number.

It is an amenable number.

28189534469 is a deficient number, since it is larger than the sum of its proper divisors (1).

28189534469 is an equidigital number, since it uses as much as digits as its factorization.

28189534469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 59.

The spelling of 28189534469 in words is "twenty-eight billion, one hundred eighty-nine million, five hundred thirty-four thousand, four hundred sixty-nine".