28589065 has 8 divisors (see below), whose sum is σ = 34622280. Its totient is φ = 22660992.

The previous prime is 28589039. The next prime is 28589081. The reversal of 28589065 is 56098582.

It can be written as a sum of positive squares in 4 ways, for example, as 14661241 + 13927824 = 3829^2 + 3732^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28589065 - 2¹¹ = 28587017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25684 + ... + 26773.

It is an arithmetic number, because the mean of its divisors is an integer number (4327785).

Almost surely, 2^28589065 is an apocalyptic number.

It is an amenable number.

28589065 is a deficient number, since it is larger than the sum of its proper divisors (6033215).

28589065 is a wasteful number, since it uses less digits than its factorization.

28589065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52571.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 28589065 is about 5346.8743205727. The cubic root of 28589065 is about 305.7735983205.

The spelling of 28589065 in words is "twenty-eight million, five hundred eighty-nine thousand, sixty-five".