28233216 has 120 divisors (see below), whose sum is σ = 89050104. Its totient is φ = 8540160.

The previous prime is 28233199. The next prime is 28233217. The reversal of 28233216 is 61233282.

It is a super-2 number, since 2×28233216² = 1594228971405312, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28233216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28233217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50410 + ... + 50966.

Almost surely, 2^28233216 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 28233216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44525052).

28233216 is an abundant number, since it is smaller than the sum of its proper divisors (60816888).

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

28233216 is a wasteful number, since it uses less digits than its factorization.

28233216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 573 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 28233216 is about 5313.4937658757. The cubic root of 28233216 is about 304.4996400458.

Adding to 28233216 its reverse (61233282), we get a palindrome (89466498).

The spelling of 28233216 in words is "twenty-eight million, two hundred thirty-three thousand, two hundred sixteen".