28717308115 has 8 divisors (see below), whose sum is σ = 34461912240. Its totient is φ = 22973084832.

The previous prime is 28717308101. The next prime is 28717308161. The reversal of 28717308115 is 51180371782.

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 28717308115 - 2¹¹ = 28717306067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111477 + ... + 264313.

It is an arithmetic number, because the mean of its divisors is an integer number (4307739030).

Almost surely, 2^28717308115 is an apocalyptic number.

28717308115 is a deficient number, since it is larger than the sum of its proper divisors (5744604125).

28717308115 is a wasteful number, since it uses less digits than its factorization.

28717308115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190421.

The product of its (nonzero) digits is 94080, while the sum is 43.

Adding to 28717308115 its reverse (51180371782), we get a palindrome (79897679897).

The spelling of 28717308115 in words is "twenty-eight billion, seven hundred seventeen million, three hundred eight thousand, one hundred fifteen".