400444112002 has 8 divisors (see below), whose sum is σ = 655272183312. Its totient is φ = 182020050900.

The previous prime is 400444111993. The next prime is 400444112009. The reversal of 400444112002 is 200211444004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 18202005091 = 400444112002 / (4 + 0 + 0 + 4 + 4 + 4 + 1 + 1 + 2 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (400444112009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9101002524 + ... + 9101002567.

It is an arithmetic number, because the mean of its divisors is an integer number (81909022914).

Almost surely, 2^400444112002 is an apocalyptic number.

400444112002 is a deficient number, since it is larger than the sum of its proper divisors (254828071310).

400444112002 is a wasteful number, since it uses less digits than its factorization.

400444112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202005104.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 400444112002 its reverse (200211444004), we get a palindrome (600655556006).

The spelling of 400444112002 in words is "four hundred billion, four hundred forty-four million, one hundred twelve thousand, two".