404144 has 40 divisors (see below), whose sum is σ = 885360. Its totient is φ = 177408.

The previous prime is 404123. The next prime is 404161. The reversal of 404144 is 441404.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5999 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (22134).

2⁴⁰⁴¹⁴⁴ 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 404144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442680).

404144 is an abundant number, since it is smaller than the sum of its proper divisors (481216).

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

404144 is a wasteful number, since it uses less digits than its factorization.

404144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 404144 is about 635.7232102102. The cubic root of 404144 is about 73.9342000918.

Adding to 404144 its reverse (441404), we get a palindrome (845548).

The spelling of 404144 in words is "four hundred four thousand, one hundred forty-four", and thus it is an iban number.