28868635 has 8 divisors (see below), whose sum is σ = 36680256. Its totient is φ = 21736320.

The previous prime is 28868629. The next prime is 28868687. The reversal of 28868635 is 53686882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28868635 - 2³ = 28868627 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169731 + ... + 169900.

It is an arithmetic number, because the mean of its divisors is an integer number (4585032).

Almost surely, 2^28868635 is an apocalyptic number.

28868635 is a deficient number, since it is larger than the sum of its proper divisors (7811621).

28868635 is a wasteful number, since it uses less digits than its factorization.

28868635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339653.

The product of its digits is 552960, while the sum is 46.

The square root of 28868635 is about 5372.9540292096. The cubic root of 28868635 is about 306.7670781512.

The spelling of 28868635 in words is "twenty-eight million, eight hundred sixty-eight thousand, six hundred thirty-five".