28558241 has 2 divisors, whose sum is σ = 28558242. Its totient is φ = 28558240.

The previous prime is 28558237. The next prime is 28558247. The reversal of 28558241 is 14285582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28398241 + 160000 = 5329^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 28558241 - 2² = 28558237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28558247) 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 as a sum of consecutive naturals, namely, 14279120 + 14279121.

It is an arithmetic number, because the mean of its divisors is an integer number (14279121).

Almost surely, 2^28558241 is an apocalyptic number.

It is an amenable number.

28558241 is a deficient number, since it is larger than the sum of its proper divisors (1).

28558241 is an equidigital number, since it uses as much as digits as its factorization.

28558241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25600, while the sum is 35.

The square root of 28558241 is about 5343.9911115196. The cubic root of 28558241 is about 305.6636663733.

The spelling of 28558241 in words is "twenty-eight million, five hundred fifty-eight thousand, two hundred forty-one".