28518797 has 2 divisors, whose sum is σ = 28518798. Its totient is φ = 28518796.

The previous prime is 28518793. The next prime is 28518799. The reversal of 28518797 is 79781582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26739241 + 1779556 = 5171^2 + 1334^2 .

It is a cyclic number.

It is not a de Polignac number, because 28518797 - 2² = 28518793 is a prime.

Together with 28518799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28518793) 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, 14259398 + 14259399.

It is an arithmetic number, because the mean of its divisors is an integer number (14259399).

Almost surely, 2^28518797 is an apocalyptic number.

It is an amenable number.

28518797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28518797 is an equidigital number, since it uses as much as digits as its factorization.

28518797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 47.

The square root of 28518797 is about 5340.2993361796. The cubic root of 28518797 is about 305.5228762749.

The spelling of 28518797 in words is "twenty-eight million, five hundred eighteen thousand, seven hundred ninety-seven".