688266 has 12 divisors (see below), whose sum is σ = 1491282. Its totient is φ = 229416.

The previous prime is 688253. The next prime is 688277. The reversal of 688266 is 662886.

688266 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in only one way, i.e., 585225 + 103041 = 765^2 + 321^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 688266.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688266.

It is an unprimeable number.

688266 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19101 + ... + 19136.

2⁶⁸⁸²⁶⁶ is an apocalyptic number.

688266 is an abundant number, since it is smaller than the sum of its proper divisors (803016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688266 is a wasteful number, since it uses less digits than its factorization.

688266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38245 (or 38242 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 688266 is about 829.6179843759. The cubic root of 688266 is about 88.2914749662.

The spelling of 688266 in words is "six hundred eighty-eight thousand, two hundred sixty-six".