441840 has 80 divisors (see below), whose sum is σ = 1571328. Its totient is φ = 100608.

The previous prime is 441839. The next prime is 441841. The reversal of 441840 is 48144.

It is an interprime number because it is at equal distance from previous prime (441839) and next prime (441841).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 441840.

It is not an unprimeable number, because it can be changed into a prime (441841) 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, 1549 + ... + 1811.

2⁴⁴¹⁸⁴⁰ is an apocalyptic number.

441840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 441840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785664).

441840 is an abundant number, since it is smaller than the sum of its proper divisors (1129488).

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

441840 is a wasteful number, since it uses less digits than its factorization.

441840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 441840 is about 664.7104632846. The cubic root of 441840 is about 76.1649234748.

Adding to 441840 its reverse (48144), we get a palindrome (489984).

The spelling of 441840 in words is "four hundred forty-one thousand, eight hundred forty".