28285811 has 2 divisors, whose sum is σ = 28285812. Its totient is φ = 28285810.

The previous prime is 28285801. The next prime is 28285843. The reversal of 28285811 is 11858282.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28285811 is a prime.

It is a super-3 number, since 3×28285811³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28285801) 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, 14142905 + 14142906.

It is an arithmetic number, because the mean of its divisors is an integer number (14142906).

Almost surely, 2^28285811 is an apocalyptic number.

28285811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285811 is an equidigital number, since it uses as much as digits as its factorization.

28285811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 35.

The square root of 28285811 is about 5318.4406549288. The cubic root of 28285811 is about 304.6886045158.

The spelling of 28285811 in words is "twenty-eight million, two hundred eighty-five thousand, eight hundred eleven".