43489940 has 24 divisors (see below), whose sum is σ = 98354760. Its totient is φ = 16057728.

The previous prime is 43489909. The next prime is 43489949. The reversal of 43489940 is 4998434.

43489940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1317904 + 42172036 = 1148^2 + 6494^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43489949) 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 7 ways as a sum of consecutive naturals, for example, 83375 + ... + 83894.

It is an arithmetic number, because the mean of its divisors is an integer number (4098115).

Almost surely, 2^43489940 is an apocalyptic number.

It is an amenable number.

43489940 is an abundant number, since it is smaller than the sum of its proper divisors (54864820).

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

43489940 is a wasteful number, since it uses less digits than its factorization.

43489940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167291 (or 167289 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 43489940 is about 6594.6902884063. The cubic root of 43489940 is about 351.6653693964.

The spelling of 43489940 in words is "forty-three million, four hundred eighty-nine thousand, nine hundred forty".