28064767217 has 8 divisors (see below), whose sum is σ = 28211735136. Its totient is φ = 27918176832.

The previous prime is 28064767189. The next prime is 28064767243. The reversal of 28064767217 is 71276746082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28064767217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28064767267) 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 7 ways as a sum of consecutive naturals, for example, 55298 + ... + 243284.

It is an arithmetic number, because the mean of its divisors is an integer number (3526466892).

Almost surely, 2^28064767217 is an apocalyptic number.

It is an amenable number.

28064767217 is a deficient number, since it is larger than the sum of its proper divisors (146967919).

28064767217 is a wasteful number, since it uses less digits than its factorization.

28064767217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188767.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 28064767217 in words is "twenty-eight billion, sixty-four million, seven hundred sixty-seven thousand, two hundred seventeen".