28080170823 has 4 divisors (see below), whose sum is σ = 37440227768. Its totient is φ = 18720113880.

The previous prime is 28080170759. The next prime is 28080170827. The reversal of 28080170823 is 32807108082.

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

It is not a de Polignac number, because 28080170823 - 2⁶ = 28080170759 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 (28080170827) 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, 4680028468 + ... + 4680028473.

It is an arithmetic number, because the mean of its divisors is an integer number (9360056942).

Almost surely, 2^28080170823 is an apocalyptic number.

28080170823 is a deficient number, since it is larger than the sum of its proper divisors (9360056945).

28080170823 is an equidigital number, since it uses as much as digits as its factorization.

28080170823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360056944.

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 28080170823 in words is "twenty-eight billion, eighty million, one hundred seventy thousand, eight hundred twenty-three".