400222244 has 6 divisors (see below), whose sum is σ = 700388934. Its totient is φ = 200111120.

The previous prime is 400222189. The next prime is 400222247. The reversal of 400222244 is 442222004.

It can be written as a sum of positive squares in only one way, i.e., 243672100 + 156550144 = 15610^2 + 12512^2 .

It is not an unprimeable number, because it can be changed into a prime (400222247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50027777 + ... + 50027784.

It is an arithmetic number, because the mean of its divisors is an integer number (116731489).

Almost surely, 2^400222244 is an apocalyptic number.

It is an amenable number.

400222244 is a deficient number, since it is larger than the sum of its proper divisors (300166690).

400222244 is a wasteful number, since it uses less digits than its factorization.

400222244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100055565 (or 100055563 counting only the distinct ones).

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

The square root of 400222244 is about 20005.5553284581. Note that the first 3 decimals coincide. The cubic root of 400222244 is about 736.9427334459.

Adding to 400222244 its reverse (442222004), we get a palindrome (842444248).

The spelling of 400222244 in words is "four hundred million, two hundred twenty-two thousand, two hundred forty-four".