400442440244 has 48 divisors (see below), whose sum is σ = 879556406400. Its totient is φ = 154969426560.

The previous prime is 400442440241. The next prime is 400442440303. The reversal of 400442440244 is 442044244004.

It is a self number, because there is not a number n which added to its sum of digits gives 400442440244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400442440241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4316987 + ... + 4408770.

It is an arithmetic number, because the mean of its divisors is an integer number (18324091800).

Almost surely, 2^400442440244 is an apocalyptic number.

400442440244 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400442440244 is an abundant number, since it is smaller than the sum of its proper divisors (479113966156).

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

400442440244 is a wasteful number, since it uses less digits than its factorization.

400442440244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8725928 (or 8725926 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 400442440244 its reverse (442044244004), we get a palindrome (842486684248).

The spelling of 400442440244 in words is "four hundred billion, four hundred forty-two million, four hundred forty thousand, two hundred forty-four".