28718759993 has 8 divisors (see below), whose sum is σ = 35805207360. Its totient is φ = 22378254480.

The previous prime is 28718759969. The next prime is 28718759999. The reversal of 28718759993 is 39995781782.

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 28718759993 - 2⁶ = 28718759929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28718759999) 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, 186485378 + ... + 186485531.

It is an arithmetic number, because the mean of its divisors is an integer number (4475650920).

Almost surely, 2^28718759993 is an apocalyptic number.

It is an amenable number.

28718759993 is a deficient number, since it is larger than the sum of its proper divisors (7086447367).

28718759993 is a wasteful number, since it uses less digits than its factorization.

28718759993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372970927.

The product of its digits is 68584320, while the sum is 68.

The spelling of 28718759993 in words is "twenty-eight billion, seven hundred eighteen million, seven hundred fifty-nine thousand, nine hundred ninety-three".