400404404424 has 64 divisors (see below), whose sum is σ = 1006024472640. Its totient is φ = 132800624640.

The previous prime is 400404404419. The next prime is 400404404429. The reversal of 400404404424 is 424404404004.

It is an interprime number because it is at equal distance from previous prime (400404404419) and next prime (400404404429).

It is a junction number, because it is equal to n+sod(n) for n = 400404404391 and 400404404400.

It is not an unprimeable number, because it can be changed into a prime (400404404429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6871299 + ... + 6929325.

It is an arithmetic number, because the mean of its divisors is an integer number (15719132385).

Almost surely, 2^400404404424 is an apocalyptic number.

It is an amenable number.

400404404424 is an abundant number, since it is smaller than the sum of its proper divisors (605620068216).

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

400404404424 is a wasteful number, since it uses less digits than its factorization.

400404404424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59470 (or 59466 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 400404404424 its reverse (424404404004), we get a palindrome (824808808428).

The spelling of 400404404424 in words is "four hundred billion, four hundred four million, four hundred four thousand, four hundred twenty-four".