28668113 has 2 divisors, whose sum is σ = 28668114. Its totient is φ = 28668112.

The previous prime is 28668083. The next prime is 28668151. The reversal of 28668113 is 31186682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18215824 + 10452289 = 4268^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 28668113 - 2⁸ = 28667857 is a prime.

It is not a weakly prime, because it can be changed into another prime (28668163) 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, 14334056 + 14334057.

It is an arithmetic number, because the mean of its divisors is an integer number (14334057).

Almost surely, 2^28668113 is an apocalyptic number.

It is an amenable number.

28668113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28668113 is an equidigital number, since it uses as much as digits as its factorization.

28668113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 28668113 is about 5354.2612002031. The cubic root of 28668113 is about 306.0551575852.

Subtracting 28668113 from its reverse (31186682), we obtain a square (2518569 = 1587²).

The spelling of 28668113 in words is "twenty-eight million, six hundred sixty-eight thousand, one hundred thirteen".