268690 has 16 divisors (see below), whose sum is σ = 490392. Its totient is φ = 105984.

The previous prime is 268661. The next prime is 268693. The reversal of 268690 is 96862.

It can be written as a sum of positive squares in 4 ways, for example, as 165649 + 103041 = 407^2 + 321^2 .

It is a super-2 number, since 2×268690² = 144388632200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268693) 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 in 7 ways as a sum of consecutive naturals, for example, 832 + ... + 1108.

2²⁶⁸⁶⁹⁰ is an apocalyptic number.

268690 is a deficient number, since it is larger than the sum of its proper divisors (221702).

268690 is a wasteful number, since it uses less digits than its factorization.

268690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 268690 is about 518.3531614643. The cubic root of 268690 is about 64.5283412097.

The spelling of 268690 in words is "two hundred sixty-eight thousand, six hundred ninety".