400040004404 has 6 divisors (see below), whose sum is σ = 700070007714. Its totient is φ = 200020002200.

The previous prime is 400040004391. The next prime is 400040004461. The reversal of 400040004404 is 404400040004.

It can be written as a sum of positive squares in only one way, i.e., 369834259600 + 30205744804 = 608140^2 + 173798^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005000547 + ... + 50005000554.

It is an arithmetic number, because the mean of its divisors is an integer number (116678334619).

Almost surely, 2^400040004404 is an apocalyptic number.

It is an amenable number.

400040004404 is a deficient number, since it is larger than the sum of its proper divisors (300030003310).

400040004404 is a wasteful number, since it uses less digits than its factorization.

400040004404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100010001105 (or 100010001103 counting only the distinct ones).

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

Adding to 400040004404 its reverse (404400040004), we get a palindrome (804440044408).

The spelling of 400040004404 in words is "four hundred billion, forty million, four thousand, four hundred four".