28289726 has 16 divisors (see below), whose sum is σ = 43309728. Its totient is φ = 13855200.

The previous prime is 28289693. The next prime is 28289749. The reversal of 28289726 is 62798282.

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 7 ways as a sum of consecutive naturals, for example, 55991 + ... + 56493.

It is an arithmetic number, because the mean of its divisors is an integer number (2706858).

Almost surely, 2^28289726 is an apocalyptic number.

28289726 is a deficient number, since it is larger than the sum of its proper divisors (15020002).

28289726 is a wasteful number, since it uses less digits than its factorization.

28289726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027.

The product of its digits is 193536, while the sum is 44.

The square root of 28289726 is about 5318.8087012037. The cubic root of 28289726 is about 304.7026610435.

The spelling of 28289726 in words is "twenty-eight million, two hundred eighty-nine thousand, seven hundred twenty-six".