28318559 has 2 divisors, whose sum is σ = 28318560. Its totient is φ = 28318558.

The previous prime is 28318523. The next prime is 28318567. The reversal of 28318559 is 95581382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28318559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28308559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159279 + 14159280.

It is an arithmetic number, because the mean of its divisors is an integer number (14159280).

Almost surely, 2^28318559 is an apocalyptic number.

28318559 is a deficient number, since it is larger than the sum of its proper divisors (1).

28318559 is an equidigital number, since it uses as much as digits as its factorization.

28318559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 28318559 is about 5321.5184862969. The cubic root of 28318559 is about 304.8061439449.

The spelling of 28318559 in words is "twenty-eight million, three hundred eighteen thousand, five hundred fifty-nine".