28863269 has 2 divisors, whose sum is σ = 28863270. Its totient is φ = 28863268.

The previous prime is 28863239. The next prime is 28863281. The reversal of 28863269 is 96236882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28751044 + 112225 = 5362^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 28863269 - 2⁸ = 28863013 is a prime.

It is a super-4 number, since 4×28863269⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28863239) 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, 14431634 + 14431635.

It is an arithmetic number, because the mean of its divisors is an integer number (14431635).

Almost surely, 2^28863269 is an apocalyptic number.

It is an amenable number.

28863269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28863269 is an equidigital number, since it uses as much as digits as its factorization.

28863269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 28863269 is about 5372.4546531358. The cubic root of 28863269 is about 306.7480700461.

The spelling of 28863269 in words is "twenty-eight million, eight hundred sixty-three thousand, two hundred sixty-nine".