867688 has 8 divisors (see below), whose sum is σ = 1626930. Its totient is φ = 433840.

The previous prime is 867679. The next prime is 867689. The reversal of 867688 is 886768.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 842724 + 24964 = 918^2 + 158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (867689) by changing a digit.

867688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54223 + ... + 54238.

2⁸⁶⁷⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

867688 is a deficient number, since it is larger than the sum of its proper divisors (759242).

867688 is a wasteful number, since it uses less digits than its factorization.

867688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108467 (or 108463 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 867688 is about 931.4977187304. The cubic root of 867688 is about 95.3793877708.

The spelling of 867688 in words is "eight hundred sixty-seven thousand, six hundred eighty-eight".