400044400444 has 24 divisors (see below), whose sum is σ = 754118565200. Its totient is φ = 184589656704.

The previous prime is 400044400421. The next prime is 400044400447. The reversal of 400044400444 is 444004440004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400044400447) 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, 752769 + ... + 1169080.

Almost surely, 2^400044400444 is an apocalyptic number.

It is an amenable number.

400044400444 is a deficient number, since it is larger than the sum of its proper divisors (354074164756).

400044400444 is a wasteful number, since it uses less digits than its factorization.

400044400444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925869 (or 1925867 counting only the distinct ones).

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

Adding to 400044400444 its reverse (444004440004), we get a palindrome (844048840448).

The spelling of 400044400444 in words is "four hundred billion, forty-four million, four hundred thousand, four hundred forty-four".