43985916 has 108 divisors (see below), whose sum is σ = 126314552. Its totient is φ = 13304736.

The previous prime is 43985899. The next prime is 43985927. The reversal of 43985916 is 61958934.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 745495 + ... + 745553.

Almost surely, 2^43985916 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 43985916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63157276).

43985916 is an abundant number, since it is smaller than the sum of its proper divisors (82328636).

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

43985916 is a wasteful number, since it uses less digits than its factorization.

43985916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 77 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 43985916 is about 6632.1878742991. The cubic root of 43985916 is about 352.9971617659.

The spelling of 43985916 in words is "forty-three million, nine hundred eighty-five thousand, nine hundred sixteen".