404343426040 has 128 divisors (see below), whose sum is σ = 948423168000. Its totient is φ = 154955842048.

The previous prime is 404343426023. The next prime is 404343426041. The reversal of 404343426040 is 40624343404.

It is a junction number, because it is equal to n+sod(n) for n = 404343425987 and 404343426005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404343426041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139283229 + ... + 139286131.

It is an arithmetic number, because the mean of its divisors is an integer number (7409556000).

Almost surely, 2^404343426040 is an apocalyptic number.

404343426040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404343426040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474211584000).

404343426040 is an abundant number, since it is smaller than the sum of its proper divisors (544079741960).

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

404343426040 is a wasteful number, since it uses less digits than its factorization.

404343426040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3825 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 404343426040 its reverse (40624343404), we get a palindrome (444967769444).

The spelling of 404343426040 in words is "four hundred four billion, three hundred forty-three million, four hundred twenty-six thousand, forty".