43426540 has 24 divisors (see below), whose sum is σ = 91596960. Its totient is φ = 17294208.

The previous prime is 43426531. The next prime is 43426549. The reversal of 43426540 is 4562434.

43426540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

43426540 is a nontrivial binomial coefficient, being equal to C(9320, 2).

It is an interprime number because it is at equal distance from previous prime (43426531) and next prime (43426549).

It is a junction number, because it is equal to n+sod(n) for n = 43426499 and 43426508.

It is not an unprimeable number, because it can be changed into a prime (43426549) 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 7 ways as a sum of consecutive naturals, for example, 1 + ... + 9319.

It is an arithmetic number, because the mean of its divisors is an integer number (3816540).

Almost surely, 2^43426540 is an apocalyptic number.

43426540 is the 9319-th triangular number and also the 4660-th hexagonal number.

43426540 is the 3107-th centered nonagonal number.

It is an amenable number.

43426540 is an abundant number, since it is smaller than the sum of its proper divisors (48170420).

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

43426540 is a wasteful number, since it uses less digits than its factorization.

43426540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561 (or 9559 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 43426540 is about 6589.8816377838. The cubic root of 43426540 is about 351.4943993787.

Adding to 43426540 its reverse (4562434), we get a palindrome (47988974).

The spelling of 43426540 in words is "forty-three million, four hundred twenty-six thousand, five hundred forty".