400084408444 has 12 divisors (see below), whose sum is σ = 800168816944. Its totient is φ = 171464746464.

The previous prime is 400084408441. The next prime is 400084408457. The reversal of 400084408444 is 444804480004.

400084408444 is an admirable number.

It is a super-2 number, since 2×400084408444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400084408397 and 400084408406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400084408441) 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, 7144364409 + ... + 7144364464.

Almost surely, 2^400084408444 is an apocalyptic number.

It is an amenable number.

400084408444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400084408444 is a wasteful number, since it uses less digits than its factorization.

400084408444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14288728884 (or 14288728882 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 40.

Adding to 400084408444 its reverse (444804480004), we get a palindrome (844888888448).

The spelling of 400084408444 in words is "four hundred billion, eighty-four million, four hundred eight thousand, four hundred forty-four".