28283232 has 48 divisors (see below), whose sum is σ = 75004272. Its totient is φ = 9331200.

The previous prime is 28283231. The next prime is 28283263. The reversal of 28283232 is 23238282.

It is a tau number, because it is divible by the number of its divisors (48).

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 28283232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28283231) 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, 8238 + ... + 11154.

It is an arithmetic number, because the mean of its divisors is an integer number (1562589).

Almost surely, 2^28283232 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 28283232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37502136).

28283232 is an abundant number, since it is smaller than the sum of its proper divisors (46721040).

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

28283232 is a wasteful number, since it uses less digits than its factorization.

28283232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 3023 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 28283232 is about 5318.1981911170. The cubic root of 28283232 is about 304.6793440920.

It can be divided in two parts, 28283 and 232, that multiplied together give a palindrome (6561656).

The spelling of 28283232 in words is "twenty-eight million, two hundred eighty-three thousand, two hundred thirty-two".