28069588 has 12 divisors (see below), whose sum is σ = 49158900. Its totient is φ = 14024192.

The previous prime is 28069579. The next prime is 28069589. The reversal of 28069588 is 88596082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26030404 + 2039184 = 5102^2 + 1428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069589) 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 3 ways as a sum of consecutive naturals, for example, 8820 + ... + 11572.

It is an arithmetic number, because the mean of its divisors is an integer number (4096575).

Almost surely, 2^28069588 is an apocalyptic number.

It is an amenable number.

28069588 is a deficient number, since it is larger than the sum of its proper divisors (21089312).

28069588 is a wasteful number, since it uses less digits than its factorization.

28069588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306 (or 5304 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 28069588 is about 5298.0739896683. The cubic root of 28069588 is about 303.9102487820.

The spelling of 28069588 in words is "twenty-eight million, sixty-nine thousand, five hundred eighty-eight".