28083405617 has 4 divisors (see below), whose sum is σ = 28085186340. Its totient is φ = 28081624896.

The previous prime is 28083405523. The next prime is 28083405659. The reversal of 28083405617 is 71650438082.

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 26362068496 + 1721337121 = 162364^2 + 41489^2 .

It is a cyclic number.

It is not a de Polignac number, because 28083405617 - 2²⁰ = 28082357041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28083905617) 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 in 3 ways as a sum of consecutive naturals, for example, 866492 + ... + 898317.

It is an arithmetic number, because the mean of its divisors is an integer number (7021296585).

Almost surely, 2^28083405617 is an apocalyptic number.

It is an amenable number.

28083405617 is a deficient number, since it is larger than the sum of its proper divisors (1780723).

28083405617 is a wasteful number, since it uses less digits than its factorization.

28083405617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780722.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 28083405617 in words is "twenty-eight billion, eighty-three million, four hundred five thousand, six hundred seventeen".