28289303 has 16 divisors (see below), whose sum is σ = 33337920. Its totient is φ = 23500800.

The previous prime is 28289281. The next prime is 28289321. The reversal of 28289303 is 30398282.

It is a cyclic number.

It is not a de Polignac number, because 28289303 - 2⁸ = 28289047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28289323) 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, 68963 + ... + 69371.

It is an arithmetic number, because the mean of its divisors is an integer number (2083620).

Almost surely, 2^28289303 is an apocalyptic number.

28289303 is a deficient number, since it is larger than the sum of its proper divisors (5048617).

28289303 is a wasteful number, since it uses less digits than its factorization.

28289303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 28289303 is about 5318.7689365115. The cubic root of 28289303 is about 304.7011423547.

The spelling of 28289303 in words is "twenty-eight million, two hundred eighty-nine thousand, three hundred three".