43722140 has 144 divisors (see below), whose sum is σ = 120657600. Its totient is φ = 13009920.

The previous prime is 43722139. The next prime is 43722187. The reversal of 43722140 is 4122734.

43722140 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 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 47 ways as a sum of consecutive naturals, for example, 491216 + ... + 491304.

It is an arithmetic number, because the mean of its divisors is an integer number (837900).

Almost surely, 2^43722140 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 43722140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60328800).

43722140 is an abundant number, since it is smaller than the sum of its proper divisors (76935460).

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

43722140 is a wasteful number, since it uses less digits than its factorization.

43722140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 43722140 is about 6612.2719242330. The cubic root of 43722140 is about 352.2901253905.

Adding to 43722140 its reverse (4122734), we get a palindrome (47844874).

The spelling of 43722140 in words is "forty-three million, seven hundred twenty-two thousand, one hundred forty".