400040400044 has 6 divisors (see below), whose sum is σ = 700070700084. Its totient is φ = 200020200020.

The previous prime is 400040399981. The next prime is 400040400047. The reversal of 400040400044 is 440004040004.

It is a junction number, because it is equal to n+sod(n) for n = 400040399989 and 400040400025.

It is not an unprimeable number, because it can be changed into a prime (400040400047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005050002 + ... + 50005050009.

It is an arithmetic number, because the mean of its divisors is an integer number (116678450014).

Almost surely, 2^400040400044 is an apocalyptic number.

It is an amenable number.

400040400044 is a deficient number, since it is larger than the sum of its proper divisors (300030300040).

400040400044 is a wasteful number, since it uses less digits than its factorization.

400040400044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100010100015 (or 100010100013 counting only the distinct ones).

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

Adding to 400040400044 its reverse (440004040004), we get a palindrome (840044440048).

The spelling of 400040400044 in words is "four hundred billion, forty million, four hundred thousand, forty-four".