868636 has 12 divisors (see below), whose sum is σ = 1526728. Its totient is φ = 432432.

The previous prime is 868613. The next prime is 868639. The reversal of 868636 is 636868.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 868595 and 868604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315 + ... + 1861.

2⁸⁶⁸⁶³⁶ is an apocalyptic number.

It is an amenable number.

868636 is a deficient number, since it is larger than the sum of its proper divisors (658092).

868636 is a wasteful number, since it uses less digits than its factorization.

868636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 946 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 868636 is about 932.0064377460. The cubic root of 868636 is about 95.4141109855.

It can be divided in two parts, 8 and 68636, that added together give a square (68644 = 262²).

The spelling of 868636 in words is "eight hundred sixty-eight thousand, six hundred thirty-six".