28667608439 has 2 divisors, whose sum is σ = 28667608440. Its totient is φ = 28667608438.

The previous prime is 28667608433. The next prime is 28667608441. The reversal of 28667608439 is 93480676682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28667608439 - 2¹⁶ = 28667542903 is a prime.

It is a super-2 number, since 2×28667608439² (a number of 22 digits) contains 22 as substring.

Together with 28667608441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28667608433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333804219 + 14333804220.

It is an arithmetic number, because the mean of its divisors is an integer number (14333804220).

Almost surely, 2^28667608439 is an apocalyptic number.

28667608439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28667608439 is an equidigital number, since it uses as much as digits as its factorization.

28667608439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 59.

The spelling of 28667608439 in words is "twenty-eight billion, six hundred sixty-seven million, six hundred eight thousand, four hundred thirty-nine".