441820 has 12 divisors (see below), whose sum is σ = 927864. Its totient is φ = 176720.

The previous prime is 441811. The next prime is 441827. The reversal of 441820 is 28144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441827) by changing a digit.

441820 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11026 + ... + 11065.

It is an arithmetic number, because the mean of its divisors is an integer number (77322).

2⁴⁴¹⁸²⁰ is an apocalyptic number.

It is an amenable number.

441820 is an abundant number, since it is smaller than the sum of its proper divisors (486044).

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

441820 is a wasteful number, since it uses less digits than its factorization.

441820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22100 (or 22098 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 441820 is about 664.6954189702. The cubic root of 441820 is about 76.1637742492.

Adding to 441820 its reverse (28144), we get a palindrome (469964).

The spelling of 441820 in words is "four hundred forty-one thousand, eight hundred twenty".