868158 has 40 divisors (see below), whose sum is σ = 2038608. Its totient is φ = 275616.

The previous prime is 868157. The next prime is 868171. The reversal of 868158 is 851868.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868151) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3610 + ... + 3842.

2⁸⁶⁸¹⁵⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019304).

868158 is an abundant number, since it is smaller than the sum of its proper divisors (1170450).

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

868158 is a wasteful number, since it uses less digits than its factorization.

868158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 261 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 868158 is about 931.7499664610. The cubic root of 868158 is about 95.3966060262.

Subtracting from 868158 its reverse (851868), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 868158 in words is "eight hundred sixty-eight thousand, one hundred fifty-eight".