28238584 has 32 divisors (see below), whose sum is σ = 58320000. Its totient is φ = 12711520.

The previous prime is 28238569. The next prime is 28238591. The reversal of 28238584 is 48583282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7917 + ... + 10915.

It is an arithmetic number, because the mean of its divisors is an integer number (1822500).

Almost surely, 2^28238584 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 28238584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29160000).

28238584 is an abundant number, since it is smaller than the sum of its proper divisors (30081416).

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

28238584 is a wasteful number, since it uses less digits than its factorization.

28238584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123 (or 3119 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 28238584 is about 5313.9988709069. The cubic root of 28238584 is about 304.5189370621.

The spelling of 28238584 in words is "twenty-eight million, two hundred thirty-eight thousand, five hundred eighty-four".