28344863 has 4 divisors (see below), whose sum is σ = 28561368. Its totient is φ = 28128360.

The previous prime is 28344857. The next prime is 28344871. The reversal of 28344863 is 36844382.

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 28344863 - 2²⁰ = 27296287 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 (28343863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108056 + ... + 108317.

It is an arithmetic number, because the mean of its divisors is an integer number (7140342).

Almost surely, 2^28344863 is an apocalyptic number.

28344863 is a deficient number, since it is larger than the sum of its proper divisors (216505).

28344863 is a wasteful number, since it uses less digits than its factorization.

28344863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216504.

The product of its digits is 110592, while the sum is 38.

The square root of 28344863 is about 5323.9893876679. The cubic root of 28344863 is about 304.9004889017.

The spelling of 28344863 in words is "twenty-eight million, three hundred forty-four thousand, eight hundred sixty-three".