28484224817 has 2 divisors, whose sum is σ = 28484224818. Its totient is φ = 28484224816.

The previous prime is 28484224787. The next prime is 28484224849. The reversal of 28484224817 is 71842248482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28290903601 + 193321216 = 168199^2 + 13904^2 .

It is a cyclic number.

It is not a de Polignac number, because 28484224817 - 2²⁸ = 28215789361 is a prime.

It is a super-2 number, since 2×28484224817² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28484226817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14242112408 + 14242112409.

It is an arithmetic number, because the mean of its divisors is an integer number (14242112409).

Almost surely, 2^28484224817 is an apocalyptic number.

It is an amenable number.

28484224817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28484224817 is an equidigital number, since it uses as much as digits as its factorization.

28484224817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1835008, while the sum is 50.

The spelling of 28484224817 in words is "twenty-eight billion, four hundred eighty-four million, two hundred twenty-four thousand, eight hundred seventeen".