881820 has 96 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 221760.

The previous prime is 881813. The next prime is 881833. The reversal of 881820 is 28188.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is an unprimeable 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 31 ways as a sum of consecutive naturals, for example, 12385 + ... + 12455.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2⁸⁸¹⁸²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 881820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

881820 is an abundant number, since it is smaller than the sum of its proper divisors (2021220).

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

881820 is a wasteful number, since it uses less digits than its factorization.

881820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 881820 is about 939.0527141753. The cubic root of 881820 is about 95.8944151659.

The spelling of 881820 in words is "eight hundred eighty-one thousand, eight hundred twenty".