868646 has 4 divisors (see below), whose sum is σ = 1302972. Its totient is φ = 434322.

The previous prime is 868639. The next prime is 868663. The reversal of 868646 is 646868.

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

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217160 + ... + 217163.

It is an arithmetic number, because the mean of its divisors is an integer number (325743).

2⁸⁶⁸⁶⁴⁶ is an apocalyptic number.

868646 is a deficient number, since it is larger than the sum of its proper divisors (434326).

868646 is a wasteful number, since it uses less digits than its factorization.

868646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434325.

The product of its digits is 55296, while the sum is 38.

The square root of 868646 is about 932.0118025004. The cubic root of 868646 is about 95.4144771294.

The spelling of 868646 in words is "eight hundred sixty-eight thousand, six hundred forty-six".