861882 has 16 divisors (see below), whose sum is σ = 1970112. Its totient is φ = 246240.

The previous prime is 861881. The next prime is 861899. The reversal of 861882 is 288168.

861882 is nontrivially palindromic in base 5.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (861881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10219 + ... + 10302.

It is an arithmetic number, because the mean of its divisors is an integer number (123132).

2⁸⁶¹⁸⁸² is an apocalyptic number.

861882 is an abundant number, since it is smaller than the sum of its proper divisors (1108230).

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

861882 is a wasteful number, since it uses less digits than its factorization.

861882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20533.

The product of its digits is 6144, while the sum is 33.

The square root of 861882 is about 928.3760014132. The cubic root of 861882 is about 95.1661726908.

The spelling of 861882 in words is "eight hundred sixty-one thousand, eight hundred eighty-two".