40043304432 has 120 divisors (see below), whose sum is σ = 118802414016. Its totient is φ = 12547289088.

The previous prime is 40043304421. The next prime is 40043304437. The reversal of 40043304432 is 23440334004.

It is a junction number, because it is equal to n+sod(n) for n = 40043304396 and 40043304405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043304437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2088393 + ... + 2107479.

Almost surely, 2^40043304432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40043304432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59401207008).

40043304432 is an abundant number, since it is smaller than the sum of its proper divisors (78759109584).

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

40043304432 is a wasteful number, since it uses less digits than its factorization.

40043304432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19975 (or 19966 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 40043304432 its reverse (23440334004), we get a palindrome (63483638436).

The spelling of 40043304432 in words is "forty billion, forty-three million, three hundred four thousand, four hundred thirty-two".