28023203 has 16 divisors (see below), whose sum is σ = 31018176. Its totient is φ = 25159680.

The previous prime is 28023199. The next prime is 28023221. The reversal of 28023203 is 30232082.

It is a happy number.

It is not a de Polignac number, because 28023203 - 2² = 28023199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28023253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89375 + ... + 89687.

It is an arithmetic number, because the mean of its divisors is an integer number (1938636).

Almost surely, 2^28023203 is an apocalyptic number.

28023203 is a deficient number, since it is larger than the sum of its proper divisors (2994973).

28023203 is a wasteful number, since it uses less digits than its factorization.

28023203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 28023203 is about 5293.6946455193. The cubic root of 28023203 is about 303.7427525692.

Adding to 28023203 its reverse (30232082), we get a palindrome (58255285).

The spelling of 28023203 in words is "twenty-eight million, twenty-three thousand, two hundred three".