400443244 has 12 divisors (see below), whose sum is σ = 723381568. Its totient is φ = 193762800.

The previous prime is 400443233. The next prime is 400443247. The reversal of 400443244 is 442344004.

400443244 = 330² + 331² + ... + 1073².

It is not an unprimeable number, because it can be changed into a prime (400443247) 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, 1614567 + ... + 1614814.

Almost surely, 2^400443244 is an apocalyptic number.

It is an amenable number.

400443244 is a deficient number, since it is larger than the sum of its proper divisors (322938324).

400443244 is a wasteful number, since it uses less digits than its factorization.

400443244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229416 (or 3229414 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 400443244 is about 20011.0780319302. The cubic root of 400443244 is about 737.0783534073.

Adding to 400443244 its reverse (442344004), we get a palindrome (842787248).

The spelling of 400443244 in words is "four hundred million, four hundred forty-three thousand, two hundred forty-four".