400443344 has 40 divisors (see below), whose sum is σ = 888782400. Its totient is φ = 171214848.

The previous prime is 400443343. The next prime is 400443349. The reversal of 400443344 is 443344004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400443343) 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 in 7 ways as a sum of consecutive naturals, for example, 46307 + ... + 54269.

It is an arithmetic number, because the mean of its divisors is an integer number (22219560).

Almost surely, 2^400443344 is an apocalyptic number.

It is an amenable number.

400443344 is an abundant number, since it is smaller than the sum of its proper divisors (488339056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400443344 is a wasteful number, since it uses less digits than its factorization.

400443344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8427 (or 8421 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 400443344 is about 20011.0805305461. The cubic root of 400443344 is about 737.0784147625.

Adding to 400443344 its reverse (443344004), we get a palindrome (843787348).

The spelling of 400443344 in words is "four hundred million, four hundred forty-three thousand, three hundred forty-four".