404004044040 has 64 divisors (see below), whose sum is σ = 1224012288960. Its totient is φ = 106667731200.

The previous prime is 404004043997. The next prime is 404004044071. The reversal of 404004044040 is 40440400404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 404004044040.

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, 16654714 + ... + 16678953.

It is an arithmetic number, because the mean of its divisors is an integer number (19125192015).

Almost surely, 2^404004044040 is an apocalyptic number.

404004044040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404004044040 is an abundant number, since it is smaller than the sum of its proper divisors (820008244920).

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

404004044040 is a wasteful number, since it uses less digits than its factorization.

404004044040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333782 (or 33333778 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 404004044040 its reverse (40440400404), we get a palindrome (444444444444).

The spelling of 404004044040 in words is "four hundred four billion, four million, forty-four thousand, forty".