400550434424 has 64 divisors (see below), whose sum is σ = 867642589440. Its totient is φ = 169808820480.

The previous prime is 400550434423. The next prime is 400550434477. The reversal of 400550434424 is 424434055004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400550434423) by changing a digit.

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, 2208947 + ... + 2383389.

It is an arithmetic number, because the mean of its divisors is an integer number (13556915460).

Almost surely, 2^400550434424 is an apocalyptic number.

It is an amenable number.

400550434424 is an abundant number, since it is smaller than the sum of its proper divisors (467092155016).

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

400550434424 is a wasteful number, since it uses less digits than its factorization.

400550434424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174900 (or 174896 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 35.

Adding to 400550434424 its reverse (424434055004), we get a palindrome (824984489428).

The spelling of 400550434424 in words is "four hundred billion, five hundred fifty million, four hundred thirty-four thousand, four hundred twenty-four".