868626 has 48 divisors (see below), whose sum is σ = 2122848. Its totient is φ = 254400.

The previous prime is 868613. The next prime is 868639. The reversal of 868626 is 626868.

It is an interprime number because it is at equal distance from previous prime (868613) and next prime (868639).

It is a super-2 number, since 2×868626² = 1509022255752, which contains 22 as substring.

It is an unprimeable number.

868626 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 (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8065 + ... + 8171.

It is an arithmetic number, because the mean of its divisors is an integer number (44226).

2⁸⁶⁸⁶²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061424).

868626 is an abundant number, since it is smaller than the sum of its proper divisors (1254222).

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

868626 is a wasteful number, since it uses less digits than its factorization.

868626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 868626 is about 932.0010729608. The cubic root of 868626 is about 95.4137448387.

It can be divided in two parts, 86862 and 6, that added together give a palindrome (86868).

The spelling of 868626 in words is "eight hundred sixty-eight thousand, six hundred twenty-six".