400444444444 has 24 divisors (see below), whose sum is σ = 789145652736. Its totient is φ = 176148582000.

The previous prime is 400444444441. The next prime is 400444444453. The reversal of 400444444444 is 444444444004.

400444444444 is a modest number, since divided by 444444 gives 400444 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 400444444397 and 400444444406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444444441) 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, 146789122 + ... + 146791849.

It is an arithmetic number, because the mean of its divisors is an integer number (32881068864).

Almost surely, 2^400444444444 is an apocalyptic number.

400444444444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400444444444 is a deficient number, since it is larger than the sum of its proper divisors (388701208292).

400444444444 is a wasteful number, since it uses less digits than its factorization.

400444444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293581017 (or 293581015 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 40.

Adding to 400444444444 its reverse (444444444004), we get a palindrome (844888888448).

The spelling of 400444444444 in words is "four hundred billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-four".