28843229 has 2 divisors, whose sum is σ = 28843230. Its totient is φ = 28843228.

The previous prime is 28843223. The next prime is 28843231. The reversal of 28843229 is 92234882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 5784025 = 4802^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 28843229 - 2¹² = 28839133 is a prime.

It is a Sophie Germain prime.

Together with 28843231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28843192 and 28843201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28843223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14421614 + 14421615.

It is an arithmetic number, because the mean of its divisors is an integer number (14421615).

Almost surely, 2^28843229 is an apocalyptic number.

It is an amenable number.

28843229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28843229 is an equidigital number, since it uses as much as digits as its factorization.

28843229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 28843229 is about 5370.5892600347. The cubic root of 28843229 is about 306.6770610581.

The spelling of 28843229 in words is "twenty-eight million, eight hundred forty-three thousand, two hundred twenty-nine".