400440004424 has 16 divisors (see below), whose sum is σ = 750843099900. Its totient is φ = 200215177792.

The previous prime is 400440004417. The next prime is 400440004439. The reversal of 400440004424 is 424400044004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 365683859524 + 34756144900 = 604718^2 + 186430^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400440004393 and 400440004402.

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 3 ways as a sum of consecutive naturals, for example, 237239 + ... + 925830.

Almost surely, 2^400440004424 is an apocalyptic number.

It is an amenable number.

400440004424 is a deficient number, since it is larger than the sum of its proper divisors (350403095476).

400440004424 is a wasteful number, since it uses less digits than its factorization.

400440004424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206112 (or 1206108 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 400440004424 its reverse (424400044004), we get a palindrome (824840048428).

The spelling of 400440004424 in words is "four hundred billion, four hundred forty million, four thousand, four hundred twenty-four".