243728443 has 8 divisors (see below), whose sum is σ = 278848512. Its totient is φ = 208683816.

The previous prime is 243728437. The next prime is 243728449. The reversal of 243728443 is 344827342.

It is an interprime number because it is at equal distance from previous prime (243728437) and next prime (243728449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243728443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243728449) 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, 11755 + ... + 25012.

It is an arithmetic number, because the mean of its divisors is an integer number (34856064).

Almost surely, 2^243728443 is an apocalyptic number.

243728443 is a deficient number, since it is larger than the sum of its proper divisors (35120069).

243728443 is an equidigital number, since it uses as much as digits as its factorization.

243728443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37721.

The product of its digits is 129024, while the sum is 37.

The square root of 243728443 is about 15611.8046042090. The cubic root of 243728443 is about 624.6480732333.

The spelling of 243728443 in words is "two hundred forty-three million, seven hundred twenty-eight thousand, four hundred forty-three".