404004004400 has 30 divisors (see below), whose sum is σ = 970619621532. Its totient is φ = 161601601600.

The previous prime is 404004004367. The next prime is 404004004427. The reversal of 404004004400 is 4400400404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505004606 + ... + 505005405.

Almost surely, 2^404004004400 is an apocalyptic number.

404004004400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404004004400 is an abundant number, since it is smaller than the sum of its proper divisors (566615617132).

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

404004004400 is a wasteful number, since it uses less digits than its factorization.

404004004400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010010029 (or 1010010018 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 404004004400 its reverse (4400400404), we get a palindrome (408404404804).

The spelling of 404004004400 in words is "four hundred four billion, four million, four thousand, four hundred".