43581040 has 40 divisors (see below), whose sum is σ = 104600448. Its totient is φ = 16869120.

The previous prime is 43581037. The next prime is 43581053. The reversal of 43581040 is 4018534.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 43580996 and 43581014.

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, 6307 + ... + 11266.

Almost surely, 2^43581040 is an apocalyptic number.

43581040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43581040 is an abundant number, since it is smaller than the sum of its proper divisors (61019408).

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

43581040 is a wasteful number, since it uses less digits than its factorization.

43581040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17617 (or 17611 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 43581040 is about 6601.5937469675. The cubic root of 43581040 is about 351.9107469991.

Adding to 43581040 its reverse (4018534), we get a palindrome (47599574).

The spelling of 43581040 in words is "forty-three million, five hundred eighty-one thousand, forty".