28286128 has 40 divisors (see below), whose sum is σ = 59371200. Its totient is φ = 12977664.

The previous prime is 28286119. The next prime is 28286129. The reversal of 28286128 is 82168282.

It is not an unprimeable number, because it can be changed into a prime (28286129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49428 + ... + 49996.

It is an arithmetic number, because the mean of its divisors is an integer number (1484280).

Almost surely, 2^28286128 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 28286128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29685600).

28286128 is an abundant number, since it is smaller than the sum of its proper divisors (31085072).

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

28286128 is a wasteful number, since it uses less digits than its factorization.

28286128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 823 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 28286128 is about 5318.4704568137. The cubic root of 28286128 is about 304.6897427299.

The spelling of 28286128 in words is "twenty-eight million, two hundred eighty-six thousand, one hundred twenty-eight".