28330203 has 16 divisors (see below), whose sum is σ = 41328000. Its totient is φ = 17119680.

The previous prime is 28330201. The next prime is 28330223. The reversal of 28330203 is 30203382.

It is not a de Polignac number, because 28330203 - 2¹ = 28330201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28330203.

It is not an unprimeable number, because it can be changed into a prime (28330201) 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, 12448 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (2583000).

Almost surely, 2^28330203 is an apocalyptic number.

28330203 is a deficient number, since it is larger than the sum of its proper divisors (12997797).

28330203 is a wasteful number, since it uses less digits than its factorization.

28330203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 28330203 is about 5322.6124224858. The cubic root of 28330203 is about 304.8479148604.

Adding to 28330203 its reverse (30203382), we get a palindrome (58533585).

The spelling of 28330203 in words is "twenty-eight million, three hundred thirty thousand, two hundred three".