28285333 has 4 divisors (see below), whose sum is σ = 28296268. Its totient is φ = 28274400.

The previous prime is 28285307. The next prime is 28285349. The reversal of 28285333 is 33358282.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16499844 + 11785489 = 4062^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 28285333 - 2¹³ = 28277141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835 + ... + 7567.

It is an arithmetic number, because the mean of its divisors is an integer number (7074067).

Almost surely, 2^28285333 is an apocalyptic number.

It is an amenable number.

28285333 is a deficient number, since it is larger than the sum of its proper divisors (10935).

28285333 is an equidigital number, since it uses as much as digits as its factorization.

28285333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10934.

The product of its digits is 34560, while the sum is 34.

The square root of 28285333 is about 5318.3957167552. The cubic root of 28285333 is about 304.6868882021.

The spelling of 28285333 in words is "twenty-eight million, two hundred eighty-five thousand, three hundred thirty-three".