404222402440 has 64 divisors (see below), whose sum is σ = 927024912000. Its totient is φ = 158585994240.

The previous prime is 404222402431. The next prime is 404222402531. The reversal of 404222402440 is 44204222404.

It is a junction number, because it is equal to n+sod(n) for n = 404222402399 and 404222402408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840960 + ... + 1231120.

It is an arithmetic number, because the mean of its divisors is an integer number (14484764250).

Almost surely, 2^404222402440 is an apocalyptic number.

404222402440 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 404222402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463512456000).

404222402440 is an abundant number, since it is smaller than the sum of its proper divisors (522802509560).

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

404222402440 is a wasteful number, since it uses less digits than its factorization.

404222402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390670 (or 390666 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 404222402440 its reverse (44204222404), we get a palindrome (448426624844).

The spelling of 404222402440 in words is "four hundred four billion, two hundred twenty-two million, four hundred two thousand, four hundred forty".