28224203 has 4 divisors (see below), whose sum is σ = 32256240. Its totient is φ = 24192168.

The previous prime is 28224191. The next prime is 28224223. The reversal of 28224203 is 30242282.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28224203 - 2²² = 24029899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28224223) 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, 2016008 + ... + 2016021.

It is an arithmetic number, because the mean of its divisors is an integer number (8064060).

Almost surely, 2^28224203 is an apocalyptic number.

28224203 is a deficient number, since it is larger than the sum of its proper divisors (4032037).

28224203 is an equidigital number, since it uses as much as digits as its factorization.

28224203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032036.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 28224203 is about 5312.6455744761. The cubic root of 28224203 is about 304.4672343935.

Adding to 28224203 its reverse (30242282), we get a palindrome (58466485).

The spelling of 28224203 in words is "twenty-eight million, two hundred twenty-four thousand, two hundred three".