28633638305 has 16 divisors (see below), whose sum is σ = 38296385280. Its totient is φ = 20424736512.

The previous prime is 28633638301. The next prime is 28633638307. The reversal of 28633638305 is 50383633682.

It is a cyclic number.

It is not a de Polignac number, because 28633638305 - 2² = 28633638301 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28633638305.

It is not an unprimeable number, because it can be changed into a prime (28633638301) 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 15 ways as a sum of consecutive naturals, for example, 8863289 + ... + 8866518.

It is an arithmetic number, because the mean of its divisors is an integer number (2393524080).

Almost surely, 2^28633638305 is an apocalyptic number.

It is an amenable number.

28633638305 is a deficient number, since it is larger than the sum of its proper divisors (9662746975).

28633638305 is a wasteful number, since it uses less digits than its factorization.

28633638305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17729848.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 28633638305 in words is "twenty-eight billion, six hundred thirty-three million, six hundred thirty-eight thousand, three hundred five".