268517684 has 6 divisors (see below), whose sum is σ = 469905954. Its totient is φ = 134258840.

The previous prime is 268517681. The next prime is 268517687. The reversal of 268517684 is 486715862.

It is an interprime number because it is at equal distance from previous prime (268517681) and next prime (268517687).

It can be written as a sum of positive squares in only one way, i.e., 193210000 + 75307684 = 13900^2 + 8678^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268517681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33564707 + ... + 33564714.

It is an arithmetic number, because the mean of its divisors is an integer number (78317659).

Almost surely, 2^268517684 is an apocalyptic number.

It is an amenable number.

268517684 is a deficient number, since it is larger than the sum of its proper divisors (201388270).

268517684 is a wasteful number, since it uses less digits than its factorization.

268517684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67129425 (or 67129423 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 268517684 is about 16386.5092072717. The cubic root of 268517684 is about 645.1454384289.

The spelling of 268517684 in words is "two hundred sixty-eight million, five hundred seventeen thousand, six hundred eighty-four".