28065133 has 2 divisors, whose sum is σ = 28065134. Its totient is φ = 28065132.

The previous prime is 28065119. The next prime is 28065139. The reversal of 28065133 is 33156082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 49284 = 5293^2 + 222^2 .

It is a cyclic number.

It is not a de Polignac number, because 28065133 - 2⁵ = 28065101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28065139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14032566 + 14032567.

It is an arithmetic number, because the mean of its divisors is an integer number (14032567).

Almost surely, 2^28065133 is an apocalyptic number.

It is an amenable number.

28065133 is a deficient number, since it is larger than the sum of its proper divisors (1).

28065133 is an equidigital number, since it uses as much as digits as its factorization.

28065133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 28065133 is about 5297.6535371804. The cubic root of 28065133 is about 303.8941697929.

The spelling of 28065133 in words is "twenty-eight million, sixty-five thousand, one hundred thirty-three".