28382838 has 64 divisors (see below), whose sum is σ = 64703232. Its totient is φ = 8225280.

The previous prime is 28382833. The next prime is 28382857. The reversal of 28382838 is 83828382.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28382838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28382833) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 207106 + ... + 207242.

It is an arithmetic number, because the mean of its divisors is an integer number (1010988).

Almost surely, 2^28382838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28382838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32351616).

28382838 is an abundant number, since it is smaller than the sum of its proper divisors (36320394).

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

28382838 is a wasteful number, since it uses less digits than its factorization.

28382838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its digits is 147456, while the sum is 42.

The square root of 28382838 is about 5327.5545985001. The cubic root of 28382838 is about 305.0365915070.

The spelling of 28382838 in words is "twenty-eight million, three hundred eighty-two thousand, eight hundred thirty-eight".