28718759117 has 8 divisors (see below), whose sum is σ = 29503726560. Its totient is φ = 27939114000.

The previous prime is 28718759081. The next prime is 28718759161. The reversal of 28718759117 is 71195781782.

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 28718759117 - 2¹⁴ = 28718742733 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 (28718759177) 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, 1319642 + ... + 1341227.

It is an arithmetic number, because the mean of its divisors is an integer number (3687965820).

Almost surely, 2^28718759117 is an apocalyptic number.

It is an amenable number.

28718759117 is a deficient number, since it is larger than the sum of its proper divisors (784967443).

28718759117 is a wasteful number, since it uses less digits than its factorization.

28718759117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661163.

The product of its digits is 1975680, while the sum is 56.

The spelling of 28718759117 in words is "twenty-eight billion, seven hundred eighteen million, seven hundred fifty-nine thousand, one hundred seventeen".