28259284 has 12 divisors (see below), whose sum is σ = 49510944. Its totient is φ = 14113304.

The previous prime is 28259281. The next prime is 28259293. The reversal of 28259284 is 48295282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28259281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (4125912).

Almost surely, 2^28259284 is an apocalyptic number.

It is an amenable number.

28259284 is a deficient number, since it is larger than the sum of its proper divisors (21251660).

28259284 is a wasteful number, since it uses less digits than its factorization.

28259284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8174 (or 8172 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 28259284 is about 5315.9461998782. The cubic root of 28259284 is about 304.5933270336.

The spelling of 28259284 in words is "twenty-eight million, two hundred fifty-nine thousand, two hundred eighty-four".