28865305 has 8 divisors (see below), whose sum is σ = 39586752. Its totient is φ = 19793328.

The previous prime is 28865267. The next prime is 28865327. The reversal of 28865305 is 50356882.

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 28865305 - 2¹³ = 28857113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412327 + ... + 412396.

It is an arithmetic number, because the mean of its divisors is an integer number (4948344).

Almost surely, 2^28865305 is an apocalyptic number.

It is an amenable number.

28865305 is a deficient number, since it is larger than the sum of its proper divisors (10721447).

28865305 is an equidigital number, since it uses as much as digits as its factorization.

28865305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824735.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28865305 is about 5372.6441348744. The cubic root of 28865305 is about 306.7552824930.

The spelling of 28865305 in words is "twenty-eight million, eight hundred sixty-five thousand, three hundred five".