881806 has 4 divisors (see below), whose sum is σ = 1322712. Its totient is φ = 440902.

The previous prime is 881779. The next prime is 881813. The reversal of 881806 is 608188.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

881806 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 as a sum of consecutive naturals, namely, 220450 + ... + 220453.

It is an arithmetic number, because the mean of its divisors is an integer number (330678).

2⁸⁸¹⁸⁰⁶ is an apocalyptic number.

881806 is a deficient number, since it is larger than the sum of its proper divisors (440906).

881806 is a wasteful number, since it uses less digits than its factorization.

881806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440905.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 881806 is about 939.0452598251. The cubic root of 881806 is about 95.8939076818.

The spelling of 881806 in words is "eight hundred eighty-one thousand, eight hundred six".