28324716989 has 2 divisors, whose sum is σ = 28324716990. Its totient is φ = 28324716988.

The previous prime is 28324716949. The next prime is 28324717009. The reversal of 28324716989 is 98961742382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26587911364 + 1736805625 = 163058^2 + 41675^2 .

It is a cyclic number.

It is not a de Polignac number, because 28324716989 - 2¹² = 28324712893 is a prime.

It is a super-2 number, since 2×28324716989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28324716919) 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, 14162358494 + 14162358495.

It is an arithmetic number, because the mean of its divisors is an integer number (14162358495).

Almost surely, 2^28324716989 is an apocalyptic number.

It is an amenable number.

28324716989 is a deficient number, since it is larger than the sum of its proper divisors (1).

28324716989 is an equidigital number, since it uses as much as digits as its factorization.

28324716989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 59.

The spelling of 28324716989 in words is "twenty-eight billion, three hundred twenty-four million, seven hundred sixteen thousand, nine hundred eighty-nine".