43540431440 has 80 divisors (see below), whose sum is σ = 111466704960. Its totient is φ = 15684879360.

The previous prime is 43540431437. The next prime is 43540431443. The reversal of 43540431440 is 4413404534.

It is an interprime number because it is at equal distance from previous prime (43540431437) and next prime (43540431443).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 43540431397 and 43540431406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43540431443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137045 + ... + 325364.

It is an arithmetic number, because the mean of its divisors is an integer number (1393333812).

Almost surely, 2^43540431440 is an apocalyptic number.

43540431440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43540431440 is an abundant number, since it is smaller than the sum of its proper divisors (67926273520).

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

43540431440 is a wasteful number, since it uses less digits than its factorization.

43540431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462540 (or 462534 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 43540431440 its reverse (4413404534), we get a palindrome (47953835974).

The spelling of 43540431440 in words is "forty-three billion, five hundred forty million, four hundred thirty-one thousand, four hundred forty".