404440440444 has 48 divisors (see below), whose sum is σ = 1049584667040. Its totient is φ = 134680360320.

The previous prime is 404440440427. The next prime is 404440440473. The reversal of 404440440444 is 444044044404.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 404440440399 and 404440440408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1738977 + ... + 1957784.

It is an arithmetic number, because the mean of its divisors is an integer number (21866347230).

Almost surely, 2^404440440444 is an apocalyptic number.

It is an amenable number.

404440440444 is an abundant number, since it is smaller than the sum of its proper divisors (645144226596).

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

404440440444 is a wasteful number, since it uses less digits than its factorization.

404440440444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697787 (or 3697779 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 36.

Adding to 404440440444 its reverse (444044044404), we get a palindrome (848484484848).

The spelling of 404440440444 in words is "four hundred four billion, four hundred forty million, four hundred forty thousand, four hundred forty-four".