43433728 has 72 divisors (see below), whose sum is σ = 96607616. Its totient is φ = 19353600.

The previous prime is 43433723. The next prime is 43433749. The reversal of 43433728 is 82733434.

It is a happy number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 43433693 and 43433702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43433723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102958 + ... + 103378.

Almost surely, 2^43433728 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 43433728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48303808).

43433728 is an abundant number, since it is smaller than the sum of its proper divisors (53173888).

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

43433728 is a wasteful number, since it uses less digits than its factorization.

43433728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 467 counting only the distinct ones).

The product of its digits is 48384, while the sum is 34.

The square root of 43433728 is about 6590.4269967886. The cubic root of 43433728 is about 351.5137915320.

The spelling of 43433728 in words is "forty-three million, four hundred thirty-three thousand, seven hundred twenty-eight".