28340025617 has 8 divisors (see below), whose sum is σ = 29428937160. Its totient is φ = 27270051840.

The previous prime is 28340025601. The next prime is 28340025653. The reversal of 28340025617 is 71652004382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 110649361 + 28229376256 = 10519^2 + 168016^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28340025617 - 2⁴ = 28340025601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28340025677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4731392 + ... + 4737377.

It is an arithmetic number, because the mean of its divisors is an integer number (3678617145).

Almost surely, 2^28340025617 is an apocalyptic number.

It is an amenable number.

28340025617 is a deficient number, since it is larger than the sum of its proper divisors (1088911543).

28340025617 is an equidigital number, since it uses as much as digits as its factorization.

28340025617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9468883.

The product of its (nonzero) digits is 80640, while the sum is 38.

Adding to 28340025617 its reverse (71652004382), we get a palindrome (99992029999).

The spelling of 28340025617 in words is "twenty-eight billion, three hundred forty million, twenty-five thousand, six hundred seventeen".