28305063 has 12 divisors (see below), whose sum is σ = 40985568. Its totient is φ = 18823680.

The previous prime is 28305061. The next prime is 28305071. The reversal of 28305063 is 36050382.

It is not a de Polignac number, because 28305063 - 2¹ = 28305061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28305061) 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 11 ways as a sum of consecutive naturals, for example, 231 + ... + 7527.

It is an arithmetic number, because the mean of its divisors is an integer number (3415464).

Almost surely, 2^28305063 is an apocalyptic number.

28305063 is a deficient number, since it is larger than the sum of its proper divisors (12680505).

28305063 is a wasteful number, since it uses less digits than its factorization.

28305063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734 (or 7731 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 28305063 is about 5320.2502760678. The cubic root of 28305063 is about 304.7577149578.

The spelling of 28305063 in words is "twenty-eight million, three hundred five thousand, sixty-three".