28675865199 has 4 divisors (see below), whose sum is σ = 38234486936. Its totient is φ = 19117243464.

The previous prime is 28675865137. The next prime is 28675865203. The reversal of 28675865199 is 99156857682.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28675865199 - 2²⁴ = 28659087983 is a prime.

It is a super-2 number, since 2×28675865199² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28675865399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4779310864 + ... + 4779310869.

It is an arithmetic number, because the mean of its divisors is an integer number (9558621734).

Almost surely, 2^28675865199 is an apocalyptic number.

28675865199 is a deficient number, since it is larger than the sum of its proper divisors (9558621737).

28675865199 is an equidigital number, since it uses as much as digits as its factorization.

28675865199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558621736.

The product of its digits is 65318400, while the sum is 66.

The spelling of 28675865199 in words is "twenty-eight billion, six hundred seventy-five million, eight hundred sixty-five thousand, one hundred ninety-nine".