28290203 has 2 divisors, whose sum is σ = 28290204. Its totient is φ = 28290202.

The previous prime is 28290179. The next prime is 28290209. The reversal of 28290203 is 30209282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28290203 - 2²⁴ = 11512987 is a prime.

It is not a weakly prime, because it can be changed into another prime (28290209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14145101 + 14145102.

It is an arithmetic number, because the mean of its divisors is an integer number (14145102).

Almost surely, 2^28290203 is an apocalyptic number.

28290203 is a deficient number, since it is larger than the sum of its proper divisors (1).

28290203 is an equidigital number, since it uses as much as digits as its factorization.

28290203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 28290203 is about 5318.8535418829. The cubic root of 28290203 is about 304.7043735893.

Adding to 28290203 its reverse (30209282), we get a palindrome (58499485).

The spelling of 28290203 in words is "twenty-eight million, two hundred ninety thousand, two hundred three".