43404311040040 has 128 divisors (see below), whose sum is σ = 103021147296000. Its totient is φ = 16412527853568.

The previous prime is 43404311040011. The next prime is 43404311040089. The reversal of 43404311040040 is 4004011340434.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 43404311039990 and 43404311040008.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3813076189 + ... + 3813087571.

It is an arithmetic number, because the mean of its divisors is an integer number (804852713250).

Almost surely, 2^{43404311040040} is an apocalyptic number.

43404311040040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43404311040040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51510573648000).

43404311040040 is an abundant number, since it is smaller than the sum of its proper divisors (59616836255960).

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

43404311040040 is a wasteful number, since it uses less digits than its factorization.

43404311040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21779 (or 21775 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 43404311040040 its reverse (4004011340434), we get a palindrome (47408322380474).

The spelling of 43404311040040 in words is "forty-three trillion, four hundred four billion, three hundred eleven million, forty thousand, forty".