243420330 has 64 divisors (see below), whose sum is σ = 595353600. Its totient is φ = 63685440.

The previous prime is 243420329. The next prime is 243420337. The reversal of 243420330 is 33024342.

It is a junction number, because it is equal to n+sod(n) for n = 243420297 and 243420306.

It is not an unprimeable number, because it can be changed into a prime (243420337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 642081 + ... + 642459.

It is an arithmetic number, because the mean of its divisors is an integer number (9302400).

Almost surely, 2^243420330 is an apocalyptic number.

243420330 is an abundant number, since it is smaller than the sum of its proper divisors (351933270).

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

243420330 is a wasteful number, since it uses less digits than its factorization.

243420330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 243420330 is about 15601.9335340207. The cubic root of 243420330 is about 624.3847427991.

Adding to 243420330 its reverse (33024342), we get a palindrome (276444672).

The spelling of 243420330 in words is "two hundred forty-three million, four hundred twenty thousand, three hundred thirty".