28088288 has 48 divisors (see below), whose sum is σ = 57380400. Its totient is φ = 13526016.

The previous prime is 28088237. The next prime is 28088293. The reversal of 28088288 is 88288082.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 188438 + ... + 188586.

It is an arithmetic number, because the mean of its divisors is an integer number (1195425).

Almost surely, 2^28088288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28088288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28690200).

28088288 is an abundant number, since it is smaller than the sum of its proper divisors (29292112).

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

28088288 is a wasteful number, since it uses less digits than its factorization.

28088288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 44.

The square root of 28088288 is about 5299.8384881051. The cubic root of 28088288 is about 303.9777222825.

The spelling of 28088288 in words is "twenty-eight million, eighty-eight thousand, two hundred eighty-eight".