400044040004 has 24 divisors (see below), whose sum is σ = 801128549760. Its totient is φ = 171224487936.

The previous prime is 400044040003. The next prime is 400044040027. The reversal of 400044040004 is 400040440004.

It is not an unprimeable number, because it can be changed into a prime (400044040003) 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, 9267992 + ... + 9311055.

It is an arithmetic number, because the mean of its divisors is an integer number (33380356240).

Almost surely, 2^400044040004 is an apocalyptic number.

It is an amenable number.

400044040004 is an abundant number, since it is smaller than the sum of its proper divisors (401084509756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400044040004 is a wasteful number, since it uses less digits than its factorization.

400044040004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18579827 (or 18579825 counting only the distinct ones).

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

Adding to 400044040004 its reverse (400040440004), we get a palindrome (800084480008).

The spelling of 400044040004 in words is "four hundred billion, forty-four million, forty thousand, four".