28283443 has 4 divisors (see below), whose sum is σ = 28747168. Its totient is φ = 27819720.

The previous prime is 28283413. The next prime is 28283459. The reversal of 28283443 is 34438282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28283443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28283399 and 28283408.

It is not an unprimeable number, because it can be changed into a prime (28283413) 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, 231771 + ... + 231892.

It is an arithmetic number, because the mean of its divisors is an integer number (7186792).

Almost surely, 2^28283443 is an apocalyptic number.

28283443 is a deficient number, since it is larger than the sum of its proper divisors (463725).

28283443 is an equidigital number, since it uses as much as digits as its factorization.

28283443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463724.

The product of its digits is 36864, while the sum is 34.

The square root of 28283443 is about 5318.2180286258. The cubic root of 28283443 is about 304.6801017515.

The spelling of 28283443 in words is "twenty-eight million, two hundred eighty-three thousand, four hundred forty-three".