400044444444 has 36 divisors (see below), whose sum is σ = 1038553823944. Its totient is φ = 129744143712.

The previous prime is 400044444403. The next prime is 400044444451. The reversal of 400044444444 is 444444440004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×400044444444³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

400044444444 is a modest number, since divided by 444444 gives 400044 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 400044444399 and 400044444408.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 150165502 + ... + 150168165.

Almost surely, 2^400044444444 is an apocalyptic number.

It is an amenable number.

400044444444 is an abundant number, since it is smaller than the sum of its proper divisors (638509379500).

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

400044444444 is a wasteful number, since it uses less digits than its factorization.

400044444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300333714 (or 300333709 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 36.

Adding to 400044444444 its reverse (444444440004), we get a palindrome (844488884448).

The spelling of 400044444444 in words is "four hundred billion, forty-four million, four hundred forty-four thousand, four hundred forty-four".