243529728 has 96 divisors (see below), whose sum is σ = 699426000. Its totient is φ = 74907648.

The previous prime is 243529723. The next prime is 243529729. The reversal of 243529728 is 827925342.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 243529728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243529723) by changing a digit.

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, 78348 + ... + 81396.

Almost surely, 2^243529728 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 243529728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349713000).

243529728 is an abundant number, since it is smaller than the sum of its proper divisors (455896272).

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

243529728 is a wasteful number, since it uses less digits than its factorization.

243529728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087 (or 3067 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 243529728 is about 15605.4390518178. The cubic root of 243529728 is about 624.4782658174.

The spelling of 243529728 in words is "two hundred forty-three million, five hundred twenty-nine thousand, seven hundred twenty-eight".