405502422424 has 128 divisors (see below), whose sum is σ = 918040780800. Its totient is φ = 165754368000.

The previous prime is 405502422401. The next prime is 405502422431. The reversal of 405502422424 is 424224205504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 405502422424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3608364 + ... + 3719044.

It is an arithmetic number, because the mean of its divisors is an integer number (7172193600).

Almost surely, 2^405502422424 is an apocalyptic number.

405502422424 is a gapful number since it is divisible by the number (44) 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 405502422424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459020390400).

405502422424 is an abundant number, since it is smaller than the sum of its proper divisors (512538358376).

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

405502422424 is a wasteful number, since it uses less digits than its factorization.

405502422424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110825 (or 110821 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 34.

Adding to 405502422424 its reverse (424224205504), we get a palindrome (829726627928).

The spelling of 405502422424 in words is "four hundred five billion, five hundred two million, four hundred twenty-two thousand, four hundred twenty-four".