400040444 has 24 divisors (see below), whose sum is σ = 719871936. Its totient is φ = 194400000.

The previous prime is 400040441. The next prime is 400040503. The reversal of 400040444 is 444040004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040441) 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, 39944 + ... + 48944.

It is an arithmetic number, because the mean of its divisors is an integer number (29994664).

Almost surely, 2^400040444 is an apocalyptic number.

It is an amenable number.

400040444 is a deficient number, since it is larger than the sum of its proper divisors (319831492).

400040444 is a wasteful number, since it uses less digits than its factorization.

400040444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9317 (or 9315 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400040444 is about 20001.0110744432. The cubic root of 400040444 is about 736.8311317195.

Adding to 400040444 its reverse (444040004), we get a palindrome (844080448).

It can be divided in two parts, 4000 and 40444, that added together give a palindrome (44444).

The spelling of 400040444 in words is "four hundred million, forty thousand, four hundred forty-four".