404805392128 has 72 divisors (see below), whose sum is σ = 815309101152. Its totient is φ = 200586559488.

The previous prime is 404805392087. The next prime is 404805392137. The reversal of 404805392128 is 821293508404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14393376 + ... + 14421472.

It is an arithmetic number, because the mean of its divisors is an integer number (11323737516).

Almost surely, 2^404805392128 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 404805392128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407654550576).

404805392128 is an abundant number, since it is smaller than the sum of its proper divisors (410503709024).

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

404805392128 is a wasteful number, since it uses less digits than its factorization.

404805392128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617 (or 28603 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 404805392128 in words is "four hundred four billion, eight hundred five million, three hundred ninety-two thousand, one hundred twenty-eight".