28518559 has 2 divisors, whose sum is σ = 28518560. Its totient is φ = 28518558.

The previous prime is 28518547. The next prime is 28518587. The reversal of 28518559 is 95581582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28518559 - 2⁷ = 28518431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28518509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14259279 + 14259280.

It is an arithmetic number, because the mean of its divisors is an integer number (14259280).

Almost surely, 2^28518559 is an apocalyptic number.

28518559 is a deficient number, since it is larger than the sum of its proper divisors (1).

28518559 is an equidigital number, since it uses as much as digits as its factorization.

28518559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 43.

The square root of 28518559 is about 5340.2770527380. The cubic root of 28518559 is about 305.5220263717.

The spelling of 28518559 in words is "twenty-eight million, five hundred eighteen thousand, five hundred fifty-nine".