28083443 has 4 divisors (see below), whose sum is σ = 28106520. Its totient is φ = 28060368.

The previous prime is 28083379. The next prime is 28083449. The reversal of 28083443 is 34438082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28083443 - 2⁶ = 28083379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28083449) 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 3 ways as a sum of consecutive naturals, for example, 9605 + ... + 12182.

It is an arithmetic number, because the mean of its divisors is an integer number (7026630).

Almost surely, 2^28083443 is an apocalyptic number.

28083443 is a deficient number, since it is larger than the sum of its proper divisors (23077).

28083443 is a wasteful number, since it uses less digits than its factorization.

28083443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23076.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 28083443 is about 5299.3813789913. The cubic root of 28083443 is about 303.9602433870.

The spelling of 28083443 in words is "twenty-eight million, eighty-three thousand, four hundred forty-three".