404421502144242 has 384 divisors, whose sum is σ = 946415477145600. Its totient is φ = 114801415344000.

The previous prime is 404421502144189. The next prime is 404421502144243. The reversal of 404421502144242 is 242441205124404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 404421502144242.

It is not an unprimeable number, because it can be changed into a prime (404421502144243) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 392261398267 + ... + 392261399297.

It is an arithmetic number, because the mean of its divisors is an integer number (2464623638400).

Almost surely, 2^{404421502144242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404421502144242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473207738572800).

404421502144242 is an abundant number, since it is smaller than the sum of its proper divisors (541993975001358).

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

404421502144242 is a wasteful number, since it uses less digits than its factorization.

404421502144242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034 (or 2023 counting only the distinct ones).

The product of its (nonzero) digits is 327680, while the sum is 39.

Adding to 404421502144242 its reverse (242441205124404), we get a palindrome (646862707268646).

The spelling of 404421502144242 in words is "four hundred four trillion, four hundred twenty-one billion, five hundred two million, one hundred forty-four thousand, two hundred forty-two".