28318210117 has 8 divisors (see below), whose sum is σ = 28800813600. Its totient is φ = 27835694544.

The previous prime is 28318210111. The next prime is 28318210127. The reversal of 28318210117 is 71101281382.

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 28318210117 - 2¹⁹ = 28317685829 is a prime.

It is a super-2 number, since 2×28318210117² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318210111) 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, 1205359 + ... + 1228627.

It is an arithmetic number, because the mean of its divisors is an integer number (3600101700).

Almost surely, 2^28318210117 is an apocalyptic number.

It is an amenable number.

28318210117 is a deficient number, since it is larger than the sum of its proper divisors (482603483).

28318210117 is a wasteful number, since it uses less digits than its factorization.

28318210117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43955.

The product of its (nonzero) digits is 5376, while the sum is 34.

Adding to 28318210117 its reverse (71101281382), we get a palindrome (99419491499).

The spelling of 28318210117 in words is "twenty-eight billion, three hundred eighteen million, two hundred ten thousand, one hundred seventeen".