868872 has 32 divisors (see below), whose sum is σ = 2227680. Its totient is φ = 282240.

The previous prime is 868867. The next prime is 868873. The reversal of 868872 is 278868.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 868872.

It is not an unprimeable number, because it can be changed into a prime (868873) by changing a digit.

868872 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (69615).

2⁸⁶⁸⁸⁷² is an apocalyptic number.

868872 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113840).

868872 is an abundant number, since it is smaller than the sum of its proper divisors (1358808).

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

868872 is a wasteful number, since it uses less digits than its factorization.

868872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 929 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 868872 is about 932.1330377151. The cubic root of 868872 is about 95.4227512334.

The spelling of 868872 in words is "eight hundred sixty-eight thousand, eight hundred seventy-two".