43313728 has 28 divisors (see below), whose sum is σ = 87955120. Its totient is φ = 21151872.

The previous prime is 43313723. The next prime is 43313741. The reversal of 43313728 is 82731334.

It is a self number, because there is not a number n which added to its sum of digits gives 43313728.

It is not an unprimeable number, because it can be changed into a prime (43313723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5118 + ... + 10621.

Almost surely, 2^43313728 is an apocalyptic number.

It is an amenable number.

43313728 is an abundant number, since it is smaller than the sum of its proper divisors (44641392).

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

43313728 is a wasteful number, since it uses less digits than its factorization.

43313728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15794 (or 15784 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 43313728 is about 6581.3165856081. The cubic root of 43313728 is about 351.1897686771.

It can be divided in two parts, 433 and 13728, that added together give a square (14161 = 119²).

The spelling of 43313728 in words is "forty-three million, three hundred thirteen thousand, seven hundred twenty-eight".