28208546117 has 8 divisors (see below), whose sum is σ = 28319437080. Its totient is φ = 28097844480.

The previous prime is 28208546111. The next prime is 28208546203. The reversal of 28208546117 is 71164580282.

It is a Cunningham number, because it is equal to 167954²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 15332878276 + 12875667841 = 123826^2 + 113471^2 .

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 28208546117 - 2⁸ = 28208545861 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 (28208546111) 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, 255017 + ... + 348497.

It is an arithmetic number, because the mean of its divisors is an integer number (3539929635).

Almost surely, 2^28208546117 is an apocalyptic number.

It is an amenable number.

28208546117 is a deficient number, since it is larger than the sum of its proper divisors (110890963).

28208546117 is an equidigital number, since it uses as much as digits as its factorization.

28208546117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94663.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 28208546117 in words is "twenty-eight billion, two hundred eight million, five hundred forty-six thousand, one hundred seventeen".