28080023423 has 4 divisors (see below), whose sum is σ = 28282038120. Its totient is φ = 27878008728.

The previous prime is 28080023407. The next prime is 28080023437. The reversal of 28080023423 is 32432008082.

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 28080023423 - 2⁴ = 28080023407 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 28080023423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080053423) 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, 101007140 + ... + 101007417.

It is an arithmetic number, because the mean of its divisors is an integer number (7070509530).

Almost surely, 2^28080023423 is an apocalyptic number.

28080023423 is a deficient number, since it is larger than the sum of its proper divisors (202014697).

28080023423 is a wasteful number, since it uses less digits than its factorization.

28080023423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202014696.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 28080023423 in words is "twenty-eight billion, eighty million, twenty-three thousand, four hundred twenty-three".