43431304440 has 32 divisors (see below), whose sum is σ = 130293913680. Its totient is φ = 11581681152.

The previous prime is 43431304403. The next prime is 43431304453. The reversal of 43431304440 is 4440313434.

43431304440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 43431304398 and 43431304407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180963649 + ... + 180963888.

Almost surely, 2^43431304440 is an apocalyptic number.

43431304440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43431304440 is an abundant number, since it is smaller than the sum of its proper divisors (86862609240).

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

43431304440 is a wasteful number, since it uses less digits than its factorization.

43431304440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361927551 (or 361927547 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 43431304440 its reverse (4440313434), we get a palindrome (47871617874).

The spelling of 43431304440 in words is "forty-three billion, four hundred thirty-one million, three hundred four thousand, four hundred forty".