28344823 has 4 divisors (see below), whose sum is σ = 30525208. Its totient is φ = 26164440.

The previous prime is 28344821. The next prime is 28344857. The reversal of 28344823 is 32844382.

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 28344823 - 2¹ = 28344821 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 (28344821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090173 + ... + 1090198.

It is an arithmetic number, because the mean of its divisors is an integer number (7631302).

Almost surely, 2^28344823 is an apocalyptic number.

28344823 is a deficient number, since it is larger than the sum of its proper divisors (2180385).

28344823 is a wasteful number, since it uses less digits than its factorization.

28344823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180384.

The product of its digits is 36864, while the sum is 34.

The square root of 28344823 is about 5323.9856310850. The cubic root of 28344823 is about 304.9003454774.

The spelling of 28344823 in words is "twenty-eight million, three hundred forty-four thousand, eight hundred twenty-three".