28068705 has 24 divisors (see below), whose sum is σ = 55603392. Its totient is φ = 12831264.

The previous prime is 28068701. The next prime is 28068707. The reversal of 28068705 is 50786082.

It is not a de Polignac number, because 28068705 - 2² = 28068701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28068705.

It is not an unprimeable number, because it can be changed into a prime (28068701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44239 + ... + 44868.

It is an arithmetic number, because the mean of its divisors is an integer number (2316808).

Almost surely, 2^28068705 is an apocalyptic number.

It is an amenable number.

28068705 is a deficient number, since it is larger than the sum of its proper divisors (27534687).

28068705 is a wasteful number, since it uses less digits than its factorization.

28068705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89125 (or 89122 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 28068705 is about 5297.9906568434. The cubic root of 28068705 is about 303.9070619930.

It can be divided in two parts, 2806 and 8705, that added together give a palindrome (11511).

The spelling of 28068705 in words is "twenty-eight million, sixty-eight thousand, seven hundred five".