400444400404 has 24 divisors (see below), whose sum is σ = 707279636448. Its totient is φ = 198369493920.

The previous prime is 400444400401. The next prime is 400444400423. The reversal of 400444400404 is 404004444004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444400401) 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, 302122 + ... + 944545.

It is an arithmetic number, because the mean of its divisors is an integer number (29469984852).

Almost surely, 2^400444400404 is an apocalyptic number.

It is an amenable number.

400444400404 is a deficient number, since it is larger than the sum of its proper divisors (306835236044).

400444400404 is a wasteful number, since it uses less digits than its factorization.

400444400404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247415 (or 1247413 counting only the distinct ones).

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

Adding to 400444400404 its reverse (404004444004), we get a palindrome (804448844408).

The spelling of 400444400404 in words is "four hundred billion, four hundred forty-four million, four hundred thousand, four hundred four".