28239582 has 24 divisors (see below), whose sum is σ = 65700936. Its totient is φ = 8068368.

The previous prime is 28239571. The next prime is 28239641. The reversal of 28239582 is 28593282.

It is a self number, because there is not a number n which added to its sum of digits gives 28239582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47733 + ... + 48320.

It is an arithmetic number, because the mean of its divisors is an integer number (2737539).

Almost surely, 2^28239582 is an apocalyptic number.

28239582 is an abundant number, since it is smaller than the sum of its proper divisors (37461354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28239582 is a wasteful number, since it uses less digits than its factorization.

28239582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96072 (or 96065 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 28239582 is about 5314.0927729952. The cubic root of 28239582 is about 304.5225244271.

The spelling of 28239582 in words is "twenty-eight million, two hundred thirty-nine thousand, five hundred eighty-two".