400040004444 has 48 divisors (see below), whose sum is σ = 1009109942400. Its totient is φ = 122914138176.

The previous prime is 400040004391. The next prime is 400040004461. The reversal of 400040004444 is 444400040004.

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 15 ways as a sum of consecutive naturals, for example, 23701854 + ... + 23718725.

It is an arithmetic number, because the mean of its divisors is an integer number (21023123800).

Almost surely, 2^400040004444 is an apocalyptic number.

It is an amenable number.

400040004444 is an abundant number, since it is smaller than the sum of its proper divisors (609069937956).

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

400040004444 is a wasteful number, since it uses less digits than its factorization.

400040004444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47420642 (or 47420640 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400040004444 its reverse (444400040004), we get a palindrome (844440044448).

The spelling of 400040004444 in words is "four hundred billion, forty million, four thousand, four hundred forty-four".