868144 has 20 divisors (see below), whose sum is σ = 1740960. Its totient is φ = 418880.

The previous prime is 868123. The next prime is 868151. The reversal of 868144 is 441868.

It is an unprimeable number.

868144 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (87048).

2⁸⁶⁸¹⁴⁴ is an apocalyptic number.

It is an amenable number.

868144 is an abundant number, since it is smaller than the sum of its proper divisors (872816).

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

868144 is a wasteful number, since it uses less digits than its factorization.

868144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1902 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 868144 is about 931.7424536856. The cubic root of 868144 is about 95.3960932318.

The spelling of 868144 in words is "eight hundred sixty-eight thousand, one hundred forty-four".