43442540 has 24 divisors (see below), whose sum is σ = 91364112. Its totient is φ = 17351360.

The previous prime is 43442537. The next prime is 43442573. The reversal of 43442540 is 4524434.

43442540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 18302 + ... + 20538.

It is an arithmetic number, because the mean of its divisors is an integer number (3806838).

Almost surely, 2^43442540 is an apocalyptic number.

It is an amenable number.

43442540 is an abundant number, since it is smaller than the sum of its proper divisors (47921572).

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

43442540 is a wasteful number, since it uses less digits than its factorization.

43442540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 43442540 is about 6591.0955083355. The cubic root of 43442540 is about 351.5375620763.

Adding to 43442540 its reverse (4524434), we get a palindrome (47966974).

The spelling of 43442540 in words is "forty-three million, four hundred forty-two thousand, five hundred forty".