243630530 has 32 divisors (see below), whose sum is σ = 515204928. Its totient is φ = 81777600.

The previous prime is 243630509. The next prime is 243630539. The reversal of 243630530 is 35036342.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 243630530.

It is not an unprimeable number, because it can be changed into a prime (243630539) 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 15 ways as a sum of consecutive naturals, for example, 83756 + ... + 86615.

It is an arithmetic number, because the mean of its divisors is an integer number (16100154).

Almost surely, 2^243630530 is an apocalyptic number.

243630530 is an abundant number, since it is smaller than the sum of its proper divisors (271574398).

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

243630530 is a wasteful number, since it uses less digits than its factorization.

243630530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170402.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 243630530 is about 15608.6684249490. The cubic root of 243630530 is about 624.5644154296.

Adding to 243630530 its reverse (35036342), we get a palindrome (278666872).

The spelling of 243630530 in words is "two hundred forty-three million, six hundred thirty thousand, five hundred thirty".