28089593 has 12 divisors (see below), whose sum is σ = 34598772. Its totient is φ = 22659840.

The previous prime is 28089569. The next prime is 28089613. The reversal of 28089593 is 39598082.

It can be written as a sum of positive squares in 2 ways, for example, as 9314704 + 18774889 = 3052^2 + 4333^2 .

It is not a de Polignac number, because 28089593 - 2⁸ = 28089337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28089553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16028 + ... + 17693.

It is an arithmetic number, because the mean of its divisors is an integer number (2883231).

Almost surely, 2^28089593 is an apocalyptic number.

It is an amenable number.

28089593 is a deficient number, since it is larger than the sum of its proper divisors (6509179).

28089593 is a wasteful number, since it uses less digits than its factorization.

28089593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33752 (or 33745 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 28089593 is about 5299.9616036345. The cubic root of 28089593 is about 303.9824298767.

It can be divided in two parts, 28089 and 593, that added together give a palindrome (28682).

The spelling of 28089593 in words is "twenty-eight million, eighty-nine thousand, five hundred ninety-three".