28008559 has 2 divisors, whose sum is σ = 28008560. Its totient is φ = 28008558.

The previous prime is 28008551. The next prime is 28008601. The reversal of 28008559 is 95580082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28008559 - 2³ = 28008551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28008551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14004279 + 14004280.

It is an arithmetic number, because the mean of its divisors is an integer number (14004280).

Almost surely, 2^28008559 is an apocalyptic number.

28008559 is a deficient number, since it is larger than the sum of its proper divisors (1).

28008559 is an equidigital number, since it uses as much as digits as its factorization.

28008559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 28008559 is about 5292.3113098154. The cubic root of 28008559 is about 303.6898347081.

The spelling of 28008559 in words is "twenty-eight million, eight thousand, five hundred fifty-nine".