404040444440 has 64 divisors (see below), whose sum is σ = 926673190560. Its totient is φ = 158520371200.

The previous prime is 404040444433. The next prime is 404040444443. The reversal of 404040444440 is 44444040404.

It is a junction number, because it is equal to n+sod(n) for n = 404040444397 and 404040444406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404040444443) 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, 35057 + ... + 899616.

Almost surely, 2^404040444440 is an apocalyptic number.

404040444440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404040444440 is an abundant number, since it is smaller than the sum of its proper divisors (522632746120).

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

404040444440 is a wasteful number, since it uses less digits than its factorization.

404040444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934892 (or 934888 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 404040444440 its reverse (44444040404), we get a palindrome (448484484844).

The spelling of 404040444440 in words is "four hundred four billion, forty million, four hundred forty-four thousand, four hundred forty".