28363865 has 16 divisors (see below), whose sum is σ = 35985600. Its totient is φ = 21402432.

The previous prime is 28363849. The next prime is 28363873. The reversal of 28363865 is 56836382.

It is a cyclic number.

It is not a de Polignac number, because 28363865 - 2⁴ = 28363849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27326 + ... + 28344.

It is an arithmetic number, because the mean of its divisors is an integer number (2249100).

Almost surely, 2^28363865 is an apocalyptic number.

It is an amenable number.

28363865 is a deficient number, since it is larger than the sum of its proper divisors (7621735).

28363865 is a wasteful number, since it uses less digits than its factorization.

28363865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336.

The product of its digits is 207360, while the sum is 41.

The square root of 28363865 is about 5325.7736527194. The cubic root of 28363865 is about 304.9686073575.

The spelling of 28363865 in words is "twenty-eight million, three hundred sixty-three thousand, eight hundred sixty-five".