43664016 has 80 divisors (see below), whose sum is σ = 126116928. Its totient is φ = 12902400.

The previous prime is 43664009. The next prime is 43664063. The reversal of 43664016 is 61046634.

It is a congruent number.

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, 20640 + ... + 22656.

Almost surely, 2^43664016 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 43664016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63058464).

43664016 is an abundant number, since it is smaller than the sum of its proper divisors (82452912).

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

43664016 is a wasteful number, since it uses less digits than its factorization.

43664016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 43664016 is about 6607.8753014869. The cubic root of 43664016 is about 352.1339452360.

The spelling of 43664016 in words is "forty-three million, six hundred sixty-four thousand, sixteen".