28445441317 has 4 divisors (see below), whose sum is σ = 28487708620. Its totient is φ = 28403174016.

The previous prime is 28445441303. The next prime is 28445441377. The reversal of 28445441317 is 71314454482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10574831556 + 17870609761 = 102834^2 + 133681^2 .

It is a cyclic number.

It is not a de Polignac number, because 28445441317 - 2¹⁵ = 28445408549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445441377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21132642 + ... + 21133987.

It is an arithmetic number, because the mean of its divisors is an integer number (7121927155).

Almost surely, 2^28445441317 is an apocalyptic number.

It is an amenable number.

28445441317 is a deficient number, since it is larger than the sum of its proper divisors (42267303).

28445441317 is an equidigital number, since it uses as much as digits as its factorization.

28445441317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42267302.

The product of its digits is 430080, while the sum is 43.

Adding to 28445441317 its reverse (71314454482), we get a palindrome (99759895799).

The spelling of 28445441317 in words is "twenty-eight billion, four hundred forty-five million, four hundred forty-one thousand, three hundred seventeen".