400044004444 has 18 divisors (see below), whose sum is σ = 814375295160. Its totient is φ = 171447430392.

The previous prime is 400044004433. The next prime is 400044004483. The reversal of 400044004444 is 444400440004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1020520224 + ... + 1020520615.

Almost surely, 2^400044004444 is an apocalyptic number.

It is an amenable number.

400044004444 is an abundant number, since it is smaller than the sum of its proper divisors (414331290716).

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

400044004444 is a wasteful number, since it uses less digits than its factorization.

400044004444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041040857 (or 2041040848 counting only the distinct ones).

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

Adding to 400044004444 its reverse (444400440004), we get a palindrome (844444444448).

The spelling of 400044004444 in words is "four hundred billion, forty-four million, four thousand, four hundred forty-four".