43889664 has 176 divisors, whose sum is σ = 144894848. Its totient is φ = 11501568.

The previous prime is 43889663. The next prime is 43889669. The reversal of 43889664 is 46698834.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43889663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279474 + ... + 279630.

Almost surely, 2^43889664 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 43889664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72447424).

43889664 is an abundant number, since it is smaller than the sum of its proper divisors (101005184).

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

43889664 is a wasteful number, since it uses less digits than its factorization.

43889664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 182 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 43889664 is about 6624.9274713011. The cubic root of 43889664 is about 352.7394921966.

The spelling of 43889664 in words is "forty-three million, eight hundred eighty-nine thousand, six hundred sixty-four".