43091340 has 48 divisors (see below), whose sum is σ = 122196480. Its totient is φ = 11344320.

The previous prime is 43091329. The next prime is 43091353. The reversal of 43091340 is 4319034.

It is a self number, because there is not a number n which added to its sum of digits gives 43091340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (2545760).

Almost surely, 2^43091340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43091340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61098240).

43091340 is an abundant number, since it is smaller than the sum of its proper divisors (79105140).

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

43091340 is a wasteful number, since it uses less digits than its factorization.

43091340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182 (or 9180 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 43091340 is about 6564.3994394004. The cubic root of 43091340 is about 350.5876929113.

The spelling of 43091340 in words is "forty-three million, ninety-one thousand, three hundred forty".