28604223 has 12 divisors (see below), whose sum is σ = 41444208. Its totient is φ = 19010880.

The previous prime is 28604221. The next prime is 28604231. The reversal of 28604223 is 32240682.

It is not a de Polignac number, because 28604223 - 2¹ = 28604221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28604221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1683 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (3453684).

Almost surely, 2^28604223 is an apocalyptic number.

28604223 is a deficient number, since it is larger than the sum of its proper divisors (12839985).

28604223 is a wasteful number, since it uses less digits than its factorization.

28604223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9774 (or 9771 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28604223 is about 5348.2915963885. The cubic root of 28604223 is about 305.8276294369.

The spelling of 28604223 in words is "twenty-eight million, six hundred four thousand, two hundred twenty-three".