404020031423140 has 96 divisors (see below), whose sum is σ = 931524416121600. Its totient is φ = 145972828454400.

The previous prime is 404020031423093. The next prime is 404020031423143. The reversal of 404020031423140 is 41324130020404.

It is a junction number, because it is equal to n+sod(n) for n = 404020031423099 and 404020031423108.

It is not an unprimeable number, because it can be changed into a prime (404020031423143) 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, 55528425 + ... + 62381455.

It is an arithmetic number, because the mean of its divisors is an integer number (9703379334600).

Almost surely, 2^{404020031423140} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404020031423140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465762208060800).

404020031423140 is an abundant number, since it is smaller than the sum of its proper divisors (527504384698460).

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

404020031423140 is a wasteful number, since it uses less digits than its factorization.

404020031423140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6854773 (or 6854771 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 404020031423140 its reverse (41324130020404), we get a palindrome (445344161443544).

The spelling of 404020031423140 in words is "four hundred four trillion, twenty billion, thirty-one million, four hundred twenty-three thousand, one hundred forty".