28569241 has 2 divisors, whose sum is σ = 28569242. Its totient is φ = 28569240.

The previous prime is 28569239. The next prime is 28569253. The reversal of 28569241 is 14296582.

28569241 = 3779² + 3780².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14288400 + 14280841 = 3780^2 + 3779^2 .

It is a cyclic number.

It is not a de Polignac number, because 28569241 - 2¹ = 28569239 is a prime.

Together with 28569239, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28569241.

It is not a weakly prime, because it can be changed into another prime (28569271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14284620 + 14284621.

It is an arithmetic number, because the mean of its divisors is an integer number (14284621).

Almost surely, 2^28569241 is an apocalyptic number.

28569241 is the 3780-th centered square number.

It is an amenable number.

28569241 is a deficient number, since it is larger than the sum of its proper divisors (1).

28569241 is an equidigital number, since it uses as much as digits as its factorization.

28569241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 28569241 is about 5345.0202057616. The cubic root of 28569241 is about 305.7029062869.

The spelling of 28569241 in words is "twenty-eight million, five hundred sixty-nine thousand, two hundred forty-one".