28033443 has 12 divisors (see below), whose sum is σ = 40705080. Its totient is φ = 18590976.

The previous prime is 28033441. The next prime is 28033451. The reversal of 28033443 is 34433082.

It is not a de Polignac number, because 28033443 - 2¹ = 28033441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28033441) 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 11 ways as a sum of consecutive naturals, for example, 6333 + ... + 9806.

It is an arithmetic number, because the mean of its divisors is an integer number (3392090).

Almost surely, 2^28033443 is an apocalyptic number.

28033443 is a deficient number, since it is larger than the sum of its proper divisors (12671637).

28033443 is a wasteful number, since it uses less digits than its factorization.

28033443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16338 (or 16335 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 28033443 is about 5294.6617455698. The cubic root of 28033443 is about 303.7797450930.

The spelling of 28033443 in words is "twenty-eight million, thirty-three thousand, four hundred forty-three".