28304903 has 8 divisors (see below), whose sum is σ = 30980496. Its totient is φ = 25646400.

The previous prime is 28304897. The next prime is 28304917. The reversal of 28304903 is 30940382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28304903 - 2⁶ = 28304839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668 + ... + 7553.

It is an arithmetic number, because the mean of its divisors is an integer number (3872562).

Almost surely, 2^28304903 is an apocalyptic number.

28304903 is a deficient number, since it is larger than the sum of its proper divisors (2675593).

28304903 is a wasteful number, since it uses less digits than its factorization.

28304903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28304903 is about 5320.2352391600. The cubic root of 28304903 is about 304.7571407222.

The spelling of 28304903 in words is "twenty-eight million, three hundred four thousand, nine hundred three".