28817843 has 2 divisors, whose sum is σ = 28817844. Its totient is φ = 28817842.

The previous prime is 28817837. The next prime is 28817863. The reversal of 28817843 is 34871882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28817843 - 2⁶ = 28817779 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28817843.

It is not a weakly prime, because it can be changed into another prime (28817863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14408921 + 14408922.

It is an arithmetic number, because the mean of its divisors is an integer number (14408922).

Almost surely, 2^28817843 is an apocalyptic number.

28817843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28817843 is an equidigital number, since it uses as much as digits as its factorization.

28817843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 41.

The square root of 28817843 is about 5368.2253119630. The cubic root of 28817843 is about 306.5870620149.

The spelling of 28817843 in words is "twenty-eight million, eight hundred seventeen thousand, eight hundred forty-three".