28866085 has 8 divisors (see below), whose sum is σ = 36677016. Its totient is φ = 21734400.

The previous prime is 28866083. The next prime is 28866109. The reversal of 28866085 is 58066882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4571044 + 24295041 = 2138^2 + 4929^2 .

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

It is not a de Polignac number, because 28866085 - 2¹ = 28866083 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 (28866083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169716 + ... + 169885.

It is an arithmetic number, because the mean of its divisors is an integer number (4584627).

Almost surely, 2^28866085 is an apocalyptic number.

It is an amenable number.

28866085 is a deficient number, since it is larger than the sum of its proper divisors (7810931).

28866085 is a wasteful number, since it uses less digits than its factorization.

28866085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339623.

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

The square root of 28866085 is about 5372.7167243397. The cubic root of 28866085 is about 306.7580455213.

The spelling of 28866085 in words is "twenty-eight million, eight hundred sixty-six thousand, eighty-five".