441909 has 16 divisors (see below), whose sum is σ = 705600. Its totient is φ = 271728.

The previous prime is 441907. The next prime is 441913. The reversal of 441909 is 909144.

It is not a de Polignac number, because 441909 - 2¹ = 441907 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (44100).

2⁴⁴¹⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

441909 is a deficient number, since it is larger than the sum of its proper divisors (263691).

441909 is a wasteful number, since it uses less digits than its factorization.

441909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 441909 is about 664.7623635556. The cubic root of 441909 is about 76.1688880367.

It can be divided in two parts, 44 and 1909, that added together give a triangular number (1953 = T₆₂).

The spelling of 441909 in words is "four hundred forty-one thousand, nine hundred nine".