28534223 has 4 divisors (see below), whose sum is σ = 28742640. Its totient is φ = 28325808.

The previous prime is 28534213. The next prime is 28534243. The reversal of 28534223 is 32243582.

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 28534223 - 2²⁴ = 11757007 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 (28534213) 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, 104003 + ... + 104276.

It is an arithmetic number, because the mean of its divisors is an integer number (7185660).

Almost surely, 2^28534223 is an apocalyptic number.

28534223 is a deficient number, since it is larger than the sum of its proper divisors (208417).

28534223 is a wasteful number, since it uses less digits than its factorization.

28534223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208416.

The product of its digits is 11520, while the sum is 29.

The square root of 28534223 is about 5341.7434419860. The cubic root of 28534223 is about 305.5779527727.

The spelling of 28534223 in words is "twenty-eight million, five hundred thirty-four thousand, two hundred twenty-three".