43040340 has 72 divisors (see below), whose sum is σ = 149210880. Its totient is φ = 9837504.

The previous prime is 43040329. The next prime is 43040341. The reversal of 43040340 is 4304034.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43040341) 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, 15820 + ... + 18339.

Almost surely, 2^43040340 is an apocalyptic number.

It is an amenable number.

43040340 is an abundant number, since it is smaller than the sum of its proper divisors (106170540).

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

43040340 is a wasteful number, since it uses less digits than its factorization.

43040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34181 (or 34176 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 43040340 is about 6560.5136993989. The cubic root of 43040340 is about 350.4493276712.

Adding to 43040340 its reverse (4304034), we get a palindrome (47344374).

The spelling of 43040340 in words is "forty-three million, forty thousand, three hundred forty".