28320628163 has 4 divisors (see below), whose sum is σ = 29811187560. Its totient is φ = 26830068768.

The previous prime is 28320628139. The next prime is 28320628187. The reversal of 28320628163 is 36182602382.

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

It is an interprime number because it is at equal distance from previous prime (28320628139) and next prime (28320628187).

It is a cyclic number.

It is not a de Polignac number, because 28320628163 - 2²⁴ = 28303850947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28320628163.

It is not an unprimeable number, because it can be changed into a prime (28320628363) 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, 745279670 + ... + 745279707.

It is an arithmetic number, because the mean of its divisors is an integer number (7452796890).

Almost surely, 2^28320628163 is an apocalyptic number.

28320628163 is a deficient number, since it is larger than the sum of its proper divisors (1490559397).

28320628163 is a wasteful number, since it uses less digits than its factorization.

28320628163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490559396.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 28320628163 in words is "twenty-eight billion, three hundred twenty million, six hundred twenty-eight thousand, one hundred sixty-three".