868786686 has 12 divisors (see below), whose sum is σ = 1882371192. Its totient is φ = 289595556.

The previous prime is 868786637. The next prime is 868786739. The reversal of 868786686 is 686687868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24132946 + ... + 24132981.

It is an arithmetic number, because the mean of its divisors is an integer number (156864266).

Almost surely, 2^868786686 is an apocalyptic number.

868786686 is an abundant number, since it is smaller than the sum of its proper divisors (1013584506).

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

868786686 is a wasteful number, since it uses less digits than its factorization.

868786686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48265935 (or 48265932 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The square root of 868786686 is about 29475.1876329906. The cubic root of 868786686 is about 954.1962796434.

The spelling of 868786686 in words is "eight hundred sixty-eight million, seven hundred eighty-six thousand, six hundred eighty-six".