28340636117 has 4 divisors (see below), whose sum is σ = 28345719756. Its totient is φ = 28335552480.

The previous prime is 28340636111. The next prime is 28340636147. The reversal of 28340636117 is 71163604382.

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 14919645316 + 13420990801 = 122146^2 + 115849^2 .

It is a cyclic number.

It is not a de Polignac number, because 28340636117 - 2³⁴ = 11160766933 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 (28340636111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2533448 + ... + 2544609.

It is an arithmetic number, because the mean of its divisors is an integer number (7086429939).

Almost surely, 2^28340636117 is an apocalyptic number.

It is an amenable number.

28340636117 is a deficient number, since it is larger than the sum of its proper divisors (5083639).

28340636117 is an equidigital number, since it uses as much as digits as its factorization.

28340636117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083638.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 28340636117 in words is "twenty-eight billion, three hundred forty million, six hundred thirty-six thousand, one hundred seventeen".