400044444220 has 24 divisors (see below), whose sum is σ = 841278261600. Its totient is φ = 159792076992.

The previous prime is 400044444199. The next prime is 400044444271. The reversal of 400044444220 is 22444440004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14091760 + ... + 14120119.

It is an arithmetic number, because the mean of its divisors is an integer number (35053260900).

Almost surely, 2^400044444220 is an apocalyptic number.

It is an amenable number.

400044444220 is an abundant number, since it is smaller than the sum of its proper divisors (441233817380).

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

400044444220 is a wasteful number, since it uses less digits than its factorization.

400044444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28212597 (or 28212595 counting only the distinct ones).

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

Adding to 400044444220 its reverse (22444440004), we get a palindrome (422488884224).

The spelling of 400044444220 in words is "four hundred billion, forty-four million, four hundred forty-four thousand, two hundred twenty".