868618 has 12 divisors (see below), whose sum is σ = 1363698. Its totient is φ = 414920.

The previous prime is 868613. The next prime is 868639. The reversal of 868618 is 816868.

It can be written as a sum of positive squares in only one way, i.e., 804609 + 64009 = 897^2 + 253^2 .

It is an Ulam number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (868613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648 + ... + 1468.

2⁸⁶⁸⁶¹⁸ is an apocalyptic number.

868618 is a deficient number, since it is larger than the sum of its proper divisors (495080).

868618 is a wasteful number, since it uses less digits than its factorization.

868618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 846 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 868618 is about 931.9967811103. The cubic root of 868618 is about 95.4134519193.

The spelling of 868618 in words is "eight hundred sixty-eight thousand, six hundred eighteen".