869886 has 32 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 285120.

The previous prime is 869879. The next prime is 869887. The reversal of 869886 is 688968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4716 + ... + 4896.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2⁸⁶⁹⁸⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982800).

869886 is an abundant number, since it is smaller than the sum of its proper divisors (1095714).

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

869886 is a wasteful number, since it uses less digits than its factorization.

869886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 275 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 869886 is about 932.6767928924. The cubic root of 869886 is about 95.4598572183.

The spelling of 869886 in words is "eight hundred sixty-nine thousand, eight hundred eighty-six".