400440044440 has 32 divisors (see below), whose sum is σ = 901019332080. Its totient is φ = 160170820992.

The previous prime is 400440044437. The next prime is 400440044471. The reversal of 400440044440 is 44440044004.

It is a super-2 number, since 2×400440044440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400440044399 and 400440044408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1234162 + ... + 1524478.

Almost surely, 2^400440044440 is an apocalyptic number.

400440044440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400440044440 is an abundant number, since it is smaller than the sum of its proper divisors (500579287640).

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

400440044440 is a wasteful number, since it uses less digits than its factorization.

400440044440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324811 (or 324807 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400440044440 its reverse (44440044004), we get a palindrome (444880088444).

The spelling of 400440044440 in words is "four hundred billion, four hundred forty million, forty-four thousand, four hundred forty".