404213421440 has 64 divisors (see below), whose sum is σ = 966468784320. Its totient is φ = 161660928000.

The previous prime is 404213421413. The next prime is 404213421449. The reversal of 404213421440 is 44124312404.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404213421449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4532480 + ... + 4620800.

It is an arithmetic number, because the mean of its divisors is an integer number (15101074755).

Almost surely, 2^404213421440 is an apocalyptic number.

404213421440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404213421440 is an abundant number, since it is smaller than the sum of its proper divisors (562255362880).

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

404213421440 is an equidigital number, since it uses as much as digits as its factorization.

404213421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95491 (or 95479 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 404213421440 its reverse (44124312404), we get a palindrome (448337733844).

The spelling of 404213421440 in words is "four hundred four billion, two hundred thirteen million, four hundred twenty-one thousand, four hundred forty".