28030303 has 16 divisors (see below), whose sum is σ = 33177600. Its totient is φ = 23667000.

The previous prime is 28030279. The next prime is 28030319. The reversal of 28030303 is 30303082.

It is not a de Polignac number, because 28030303 - 2⁵ = 28030271 is a prime.

It is a Duffinian number.

28030303 is a modest number, since divided by 30303 gives 28 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030333) 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 15 ways as a sum of consecutive naturals, for example, 23778 + ... + 24928.

It is an arithmetic number, because the mean of its divisors is an integer number (2073600).

Almost surely, 2^28030303 is an apocalyptic number.

28030303 is a deficient number, since it is larger than the sum of its proper divisors (5147297).

28030303 is an equidigital number, since it uses as much as digits as its factorization.

28030303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 28030303 is about 5294.3652121855. The cubic root of 28030303 is about 303.7684026401.

Adding to 28030303 its reverse (30303082), we get a palindrome (58333385).

The spelling of 28030303 in words is "twenty-eight million, thirty thousand, three hundred three".