400400044004 has 24 divisors (see below), whose sum is σ = 713073973248. Its totient is φ = 196695233280.

The previous prime is 400400043977. The next prime is 400400044021. The reversal of 400400044004 is 400440004004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3773837 + ... + 3878484.

It is an arithmetic number, because the mean of its divisors is an integer number (29711415552).

Almost surely, 2^400400044004 is an apocalyptic number.

It is an amenable number.

400400044004 is a deficient number, since it is larger than the sum of its proper divisors (312673929244).

400400044004 is a wasteful number, since it uses less digits than its factorization.

400400044004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652555 (or 7652553 counting only the distinct ones).

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

Adding to 400400044004 its reverse (400440004004), we get a palindrome (800840048008).

The spelling of 400400044004 in words is "four hundred billion, four hundred million, forty-four thousand, four".