863886 has 8 divisors (see below), whose sum is σ = 1727784. Its totient is φ = 287960.

The previous prime is 863879. The next prime is 863887. The reversal of 863886 is 688368.

It is a sphenic number, since it is the product of 3 distinct primes.

863886 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863887) by changing a digit.

863886 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, 71985 + ... + 71996.

It is an arithmetic number, because the mean of its divisors is an integer number (215973).

2⁸⁶³⁸⁸⁶ is an apocalyptic number.

863886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

863886 is a wasteful number, since it uses less digits than its factorization.

863886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143986.

The product of its digits is 55296, while the sum is 39.

The square root of 863886 is about 929.4546788305. The cubic root of 863886 is about 95.2398739588.

The spelling of 863886 in words is "eight hundred sixty-three thousand, eight hundred eighty-six".