441809 has 4 divisors (see below), whose sum is σ = 447216. Its totient is φ = 436404.

The previous prime is 441799. The next prime is 441811. The reversal of 441809 is 908144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-441809 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 441809.

It is not an unprimeable number, because it can be changed into a prime (441829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (111804).

2⁴⁴¹⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

441809 is a deficient number, since it is larger than the sum of its proper divisors (5407).

441809 is an equidigital number, since it uses as much as digits as its factorization.

441809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5406.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 441809 is about 664.6871444522. The cubic root of 441809 is about 76.1631421604.

The spelling of 441809 in words is "four hundred forty-one thousand, eight hundred nine".