28500328085 has 4 divisors (see below), whose sum is σ = 34200393708. Its totient is φ = 22800262464.

The previous prime is 28500328081. The next prime is 28500328097. The reversal of 28500328085 is 58082300582.

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 21336737041 + 7163591044 = 146071^2 + 84638^2 .

It is a cyclic number.

It is not a de Polignac number, because 28500328085 - 2² = 28500328081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28500328081) 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 in 3 ways as a sum of consecutive naturals, for example, 2850032804 + ... + 2850032813.

It is an arithmetic number, because the mean of its divisors is an integer number (8550098427).

Almost surely, 2^28500328085 is an apocalyptic number.

It is an amenable number.

28500328085 is a deficient number, since it is larger than the sum of its proper divisors (5700065623).

28500328085 is an equidigital number, since it uses as much as digits as its factorization.

28500328085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5700065622.

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 28500328085 in words is "twenty-eight billion, five hundred million, three hundred twenty-eight thousand, eighty-five".