28243283 has 2 divisors, whose sum is σ = 28243284. Its totient is φ = 28243282.

The previous prime is 28243261. The next prime is 28243309. The reversal of 28243283 is 38234282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28243283 - 2²² = 24048979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28243213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14121641 + 14121642.

It is an arithmetic number, because the mean of its divisors is an integer number (14121642).

Almost surely, 2^28243283 is an apocalyptic number.

28243283 is a deficient number, since it is larger than the sum of its proper divisors (1).

28243283 is an equidigital number, since it uses as much as digits as its factorization.

28243283 is an evil number, because the sum of its binary digits is even.

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

The square root of 28243283 is about 5314.4409865949. The cubic root of 28243283 is about 304.5358271338.

Subtracting 28243283 from its reverse (38234282), we obtain a palindrome (9990999).

The spelling of 28243283 in words is "twenty-eight million, two hundred forty-three thousand, two hundred eighty-three".