28668085 has 4 divisors (see below), whose sum is σ = 34401708. Its totient is φ = 22934464.

The previous prime is 28668083. The next prime is 28668113. The reversal of 28668085 is 58086682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14814801 + 13853284 = 3849^2 + 3722^2 .

It is a cyclic number.

It is not a de Polignac number, because 28668085 - 2¹ = 28668083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28668083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2866804 + ... + 2866813.

It is an arithmetic number, because the mean of its divisors is an integer number (8600427).

Almost surely, 2^28668085 is an apocalyptic number.

It is an amenable number.

28668085 is a deficient number, since it is larger than the sum of its proper divisors (5733623).

28668085 is an equidigital number, since it uses as much as digits as its factorization.

28668085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733622.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 28668085 is about 5354.2585854626. The cubic root of 28668085 is about 306.0550579443.

The spelling of 28668085 in words is "twenty-eight million, six hundred sixty-eight thousand, eighty-five".