868736686 has 16 divisors (see below), whose sum is σ = 1383381504. Its totient is φ = 407743744.

The previous prime is 868736663. The next prime is 868736723. The reversal of 868736686 is 686637868.

It is a self number, because there is not a number n which added to its sum of digits gives 868736686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20335 + ... + 46378.

It is an arithmetic number, because the mean of its divisors is an integer number (86461344).

Almost surely, 2^868736686 is an apocalyptic number.

868736686 is a deficient number, since it is larger than the sum of its proper divisors (514644818).

868736686 is a wasteful number, since it uses less digits than its factorization.

868736686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67115.

The product of its digits is 13934592, while the sum is 58.

The square root of 868736686 is about 29474.3394497655. The cubic root of 868736686 is about 954.1779741414.

The spelling of 868736686 in words is "eight hundred sixty-eight million, seven hundred thirty-six thousand, six hundred eighty-six".