28684333 has 2 divisors, whose sum is σ = 28684334. Its totient is φ = 28684332.

The previous prime is 28684309. The next prime is 28684349. The reversal of 28684333 is 33348682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27436644 + 1247689 = 5238^2 + 1117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28684333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28684292 and 28684301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28684363) 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, 14342166 + 14342167.

It is an arithmetic number, because the mean of its divisors is an integer number (14342167).

Almost surely, 2^28684333 is an apocalyptic number.

It is an amenable number.

28684333 is a deficient number, since it is larger than the sum of its proper divisors (1).

28684333 is an equidigital number, since it uses as much as digits as its factorization.

28684333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 37.

The square root of 28684333 is about 5355.7756674454. The cubic root of 28684333 is about 306.1128672169.

The spelling of 28684333 in words is "twenty-eight million, six hundred eighty-four thousand, three hundred thirty-three".