28441543189 has 4 divisors (see below), whose sum is σ = 28761111180. Its totient is φ = 28121975200.

The previous prime is 28441543181. The next prime is 28441543219. The reversal of 28441543189 is 98134514482.

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 2241264964 + 26200278225 = 47342^2 + 161865^2 .

It is a cyclic number.

It is not a de Polignac number, because 28441543189 - 2³ = 28441543181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28441543181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159783862 + ... + 159784039.

It is an arithmetic number, because the mean of its divisors is an integer number (7190277795).

Almost surely, 2^28441543189 is an apocalyptic number.

It is an amenable number.

28441543189 is a deficient number, since it is larger than the sum of its proper divisors (319567991).

28441543189 is an equidigital number, since it uses as much as digits as its factorization.

28441543189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319567990.

The product of its digits is 1105920, while the sum is 49.

The spelling of 28441543189 in words is "twenty-eight billion, four hundred forty-one million, five hundred forty-three thousand, one hundred eighty-nine".