868682686 has 4 divisors (see below), whose sum is σ = 1303024032. Its totient is φ = 434341342.

The previous prime is 868682681. The next prime is 868682693. The reversal of 868682686 is 686286868.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 868682686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868682681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217170670 + ... + 217170673.

It is an arithmetic number, because the mean of its divisors is an integer number (325756008).

Almost surely, 2^868682686 is an apocalyptic number.

868682686 is a deficient number, since it is larger than the sum of its proper divisors (434341346).

868682686 is a wasteful number, since it uses less digits than its factorization.

868682686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434341345.

The product of its digits is 10616832, while the sum is 58.

The square root of 868682686 is about 29473.4233844662. The cubic root of 868682686 is about 954.1582034103.

The spelling of 868682686 in words is "eight hundred sixty-eight million, six hundred eighty-two thousand, six hundred eighty-six".