28275305 has 8 divisors (see below), whose sum is σ = 33962112. Its totient is φ = 22599088.

The previous prime is 28275239. The next prime is 28275307. The reversal of 28275305 is 50357282.

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 28275305 - 2²⁰ = 27226729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28275307) 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, 5534 + ... + 9336.

It is an arithmetic number, because the mean of its divisors is an integer number (4245264).

Almost surely, 2^28275305 is an apocalyptic number.

It is an amenable number.

28275305 is a deficient number, since it is larger than the sum of its proper divisors (5686807).

28275305 is a wasteful number, since it uses less digits than its factorization.

28275305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28275305 is about 5317.4528676802. The cubic root of 28275305 is about 304.6508770621.

The spelling of 28275305 in words is "twenty-eight million, two hundred seventy-five thousand, three hundred five".