268128717 has 8 divisors (see below), whose sum is σ = 358235040. Its totient is φ = 178387440.

The previous prime is 268128713. The next prime is 268128739. The reversal of 268128717 is 717821862.

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

It is not a de Polignac number, because 268128717 - 2² = 268128713 is a prime.

It is a super-3 number, since 3×268128717³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268128713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89542 + ... + 92487.

It is an arithmetic number, because the mean of its divisors is an integer number (44779380).

Almost surely, 2^268128717 is an apocalyptic number.

It is an amenable number.

268128717 is a deficient number, since it is larger than the sum of its proper divisors (90106323).

268128717 is a wasteful number, since it uses less digits than its factorization.

268128717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182523.

The product of its digits is 75264, while the sum is 42.

The square root of 268128717 is about 16374.6363929096. The cubic root of 268128717 is about 644.8337748445.

The spelling of 268128717 in words is "two hundred sixty-eight million, one hundred twenty-eight thousand, seven hundred seventeen".