28336844285 has 4 divisors (see below), whose sum is σ = 34004213148. Its totient is φ = 22669475424.

The previous prime is 28336844243. The next prime is 28336844303. The reversal of 28336844285 is 58244863382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11497629529 + 16839214756 = 107227^2 + 129766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28336844285 is a prime.

It is a super-2 number, since 2×28336844285² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833684424 + ... + 2833684433.

It is an arithmetic number, because the mean of its divisors is an integer number (8501053287).

Almost surely, 2^28336844285 is an apocalyptic number.

It is an amenable number.

28336844285 is a deficient number, since it is larger than the sum of its proper divisors (5667368863).

28336844285 is an equidigital number, since it uses as much as digits as its factorization.

28336844285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5667368862.

The product of its digits is 8847360, while the sum is 53.

The spelling of 28336844285 in words is "twenty-eight billion, three hundred thirty-six million, eight hundred forty-four thousand, two hundred eighty-five".