400444244 has 6 divisors (see below), whose sum is σ = 700777434. Its totient is φ = 200222120.

The previous prime is 400444241. The next prime is 400444249. The reversal of 400444244 is 442444004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 269616400 + 130827844 = 16420^2 + 11438^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055527 + ... + 50055534.

It is an arithmetic number, because the mean of its divisors is an integer number (116796239).

Almost surely, 2^400444244 is an apocalyptic number.

It is an amenable number.

400444244 is a deficient number, since it is larger than the sum of its proper divisors (300333190).

400444244 is a wasteful number, since it uses less digits than its factorization.

400444244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100111065 (or 100111063 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

The square root of 400444244 is about 20011.1030180747. The cubic root of 400444244 is about 737.0789669588.

Adding to 400444244 its reverse (442444004), we get a palindrome (842888248).

The spelling of 400444244 in words is "four hundred million, four hundred forty-four thousand, two hundred forty-four".