400444400044 has 12 divisors (see below), whose sum is σ = 754683677104. Its totient is φ = 184820492304.

The previous prime is 400444400033. The next prime is 400444400077. The reversal of 400444400044 is 440004444004.

It is a junction number, because it is equal to n+sod(n) for n = 400444399985 and 400444400021.

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, 3850426872 + ... + 3850426975.

Almost surely, 2^400444400044 is an apocalyptic number.

It is an amenable number.

400444400044 is a deficient number, since it is larger than the sum of its proper divisors (354239277060).

400444400044 is a wasteful number, since it uses less digits than its factorization.

400444400044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700853864 (or 7700853862 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400444400044 its reverse (440004444004), we get a palindrome (840448844048).

The spelling of 400444400044 in words is "four hundred billion, four hundred forty-four million, four hundred thousand, forty-four".