28584089 has 8 divisors (see below), whose sum is σ = 30314088. Its totient is φ = 26859520.

The previous prime is 28584079. The next prime is 28584107. The reversal of 28584089 is 98048582.

It can be written as a sum of positive squares in 4 ways, for example, as 18344089 + 10240000 = 4283^2 + 3200^2 .

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 28584089 - 2²⁰ = 27535513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28584019) by changing a digit.

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, 15749 + ... + 17469.

It is an arithmetic number, because the mean of its divisors is an integer number (3789261).

Almost surely, 2^28584089 is an apocalyptic number.

It is an amenable number.

28584089 is a deficient number, since it is larger than the sum of its proper divisors (1729999).

28584089 is a wasteful number, since it uses less digits than its factorization.

28584089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 28584089 is about 5346.4089817372. The cubic root of 28584089 is about 305.7558570651.

The spelling of 28584089 in words is "twenty-eight million, five hundred eighty-four thousand, eighty-nine".