400044444044 has 24 divisors (see below), whose sum is σ = 800251027968. Its totient is φ = 171412874640.

The previous prime is 400044444017. The next prime is 400044444049. The reversal of 400044444044 is 440444440004.

It is a self number, because there is not a number n which added to its sum of digits gives 400044444044.

It is not an unprimeable number, because it can be changed into a prime (400044444049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306802 + ... + 1583609.

It is an arithmetic number, because the mean of its divisors is an integer number (33343792832).

Almost surely, 2^400044444044 is an apocalyptic number.

It is an amenable number.

400044444044 is an abundant number, since it is smaller than the sum of its proper divisors (400206583924).

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

400044444044 is a wasteful number, since it uses less digits than its factorization.

400044444044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895365 (or 2895363 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 400044444044 its reverse (440444440004), we get a palindrome (840488884048).

The spelling of 400044444044 in words is "four hundred billion, forty-four million, four hundred forty-four thousand, forty-four".