28667833 has 2 divisors, whose sum is σ = 28667834. Its totient is φ = 28667832.

The previous prime is 28667819. The next prime is 28667851. The reversal of 28667833 is 33876682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14807104 + 13860729 = 3848^2 + 3723^2 .

It is a cyclic number.

It is not a de Polignac number, because 28667833 - 2⁵ = 28667801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28667833.

It is not a weakly prime, because it can be changed into another prime (28667813) 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, 14333916 + 14333917.

It is an arithmetic number, because the mean of its divisors is an integer number (14333917).

Almost surely, 2^28667833 is an apocalyptic number.

It is an amenable number.

28667833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28667833 is an equidigital number, since it uses as much as digits as its factorization.

28667833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 28667833 is about 5354.2350527410. The cubic root of 28667833 is about 306.0541611736.

The spelling of 28667833 in words is "twenty-eight million, six hundred sixty-seven thousand, eight hundred thirty-three".