43238728 has 32 divisors (see below), whose sum is σ = 87829560. Its totient is φ = 19837440.

The previous prime is 43238719. The next prime is 43238747. The reversal of 43238728 is 82783234.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14915044 + 28323684 = 3862^2 + 5322^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17676 + ... + 19972.

Almost surely, 2^43238728 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 43238728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43914780).

43238728 is an abundant number, since it is smaller than the sum of its proper divisors (44590832).

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

43238728 is a wasteful number, since it uses less digits than its factorization.

43238728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2493 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 43238728 is about 6575.6161688468. The cubic root of 43238728 is about 350.9869503783.

The spelling of 43238728 in words is "forty-three million, two hundred thirty-eight thousand, seven hundred twenty-eight".