400044044444 has 24 divisors (see below), whose sum is σ = 764042756736. Its totient is φ = 181761462000.

The previous prime is 400044044441. The next prime is 400044044461. The reversal of 400044044444 is 444440440004.

It is a super-2 number, since 2×400044044444² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400044044444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400044044441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1812992 + ... + 2021639.

It is an arithmetic number, because the mean of its divisors is an integer number (31835114864).

Almost surely, 2^400044044444 is an apocalyptic number.

400044044444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400044044444 is a deficient number, since it is larger than the sum of its proper divisors (363998712292).

400044044444 is a wasteful number, since it uses less digits than its factorization.

400044044444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837017 (or 3837015 counting only the distinct ones).

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

Adding to 400044044444 its reverse (444440440004), we get a palindrome (844484484448).

The spelling of 400044044444 in words is "four hundred billion, forty-four million, forty-four thousand, four hundred forty-four".