28170112117 has 16 divisors (see below), whose sum is σ = 32257440000. Its totient is φ = 24098600448.

The previous prime is 28170112111. The next prime is 28170112129. The reversal of 28170112117 is 71121107182.

It is a cyclic number.

It is not a de Polignac number, because 28170112117 - 2³¹ = 26022628469 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 (28170112111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11950503 + ... + 11952859.

It is an arithmetic number, because the mean of its divisors is an integer number (2016090000).

Almost surely, 2^28170112117 is an apocalyptic number.

It is an amenable number.

28170112117 is a deficient number, since it is larger than the sum of its proper divisors (4087327883).

28170112117 is a wasteful number, since it uses less digits than its factorization.

28170112117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980.

The product of its (nonzero) digits is 1568, while the sum is 31.

Adding to 28170112117 its reverse (71121107182), we get a palindrome (99291219299).

The spelling of 28170112117 in words is "twenty-eight billion, one hundred seventy million, one hundred twelve thousand, one hundred seventeen".