400004000044 has 24 divisors (see below), whose sum is σ = 771204840336. Its totient is φ = 180019800000.

The previous prime is 400004000029. The next prime is 400004000047. The reversal of 400004000044 is 440000400004.

It is a junction number, because it is equal to n+sod(n) for n = 400003999991 and 400004000027.

It is not an unprimeable number, because it can be changed into a prime (400004000047) 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, 45000507 + ... + 45009394.

It is an arithmetic number, because the mean of its divisors is an integer number (32133535014).

Almost surely, 2^400004000044 is an apocalyptic number.

400004000044 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400004000044 is a deficient number, since it is larger than the sum of its proper divisors (371200840292).

400004000044 is a wasteful number, since it uses less digits than its factorization.

400004000044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90010017 (or 90010015 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 400004000044 its reverse (440000400004), we get a palindrome (840004400048).

The spelling of 400004000044 in words is "four hundred billion, four million, forty-four", and thus it is an aban number.