400444112003 has 16 divisors (see below), whose sum is σ = 433917163680. Its totient is φ = 369540261792.

The previous prime is 400444111993. The next prime is 400444112009. The reversal of 400444112003 is 300211444004.

It is a happy number.

It is not a de Polignac number, because 400444112003 - 2¹² = 400444107907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400444112003.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8771825 + ... + 8817357.

It is an arithmetic number, because the mean of its divisors is an integer number (27119822730).

Almost surely, 2^400444112003 is an apocalyptic number.

400444112003 is a deficient number, since it is larger than the sum of its proper divisors (33473051677).

400444112003 is an equidigital number, since it uses as much as digits as its factorization.

400444112003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49575 (or 49549 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 400444112003 its reverse (300211444004), we get a palindrome (700655556007).

The spelling of 400444112003 in words is "four hundred billion, four hundred forty-four million, one hundred twelve thousand, three".