43942140 has 72 divisors (see below), whose sum is σ = 145415088. Its totient is φ = 10652160.

The previous prime is 43942111. The next prime is 43942147. The reversal of 43942140 is 4124934.

43942140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43942147) 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 23 ways as a sum of consecutive naturals, for example, 9117 + ... + 13076.

It is an arithmetic number, because the mean of its divisors is an integer number (2019654).

Almost surely, 2^43942140 is an apocalyptic number.

It is an amenable number.

43942140 is an abundant number, since it is smaller than the sum of its proper divisors (101472948).

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

43942140 is a wasteful number, since it uses less digits than its factorization.

43942140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22219 (or 22214 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 43942140 is about 6628.8867843704. The cubic root of 43942140 is about 352.8800187169.

The spelling of 43942140 in words is "forty-three million, nine hundred forty-two thousand, one hundred forty".