404021144400 has 120 divisors (see below), whose sum is σ = 1338842597280. Its totient is φ = 104023825920.

The previous prime is 404021144377. The next prime is 404021144473. The reversal of 404021144400 is 4441120404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5770102 + ... + 5839701.

It is an arithmetic number, because the mean of its divisors is an integer number (11157021644).

Almost surely, 2^404021144400 is an apocalyptic number.

404021144400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404021144400 is an abundant number, since it is smaller than the sum of its proper divisors (934821452880).

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

404021144400 is a wasteful number, since it uses less digits than its factorization.

404021144400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11609853 (or 11609842 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 404021144400 its reverse (4441120404), we get a palindrome (408462264804).

The spelling of 404021144400 in words is "four hundred four billion, twenty-one million, one hundred forty-four thousand, four hundred".