28443219163 has 4 divisors (see below), whose sum is σ = 30116349720. Its totient is φ = 26770088608.

The previous prime is 28443219149. The next prime is 28443219179. The reversal of 28443219163 is 36191234482.

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

It is a cyclic number.

It is not a de Polignac number, because 28443219163 - 2⁹ = 28443218651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28443211163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836565253 + ... + 836565286.

It is an arithmetic number, because the mean of its divisors is an integer number (7529087430).

Almost surely, 2^28443219163 is an apocalyptic number.

28443219163 is a deficient number, since it is larger than the sum of its proper divisors (1673130557).

28443219163 is a wasteful number, since it uses less digits than its factorization.

28443219163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673130556.

The product of its digits is 248832, while the sum is 43.

The spelling of 28443219163 in words is "twenty-eight billion, four hundred forty-three million, two hundred nineteen thousand, one hundred sixty-three".