243430320 has 80 divisors (see below), whose sum is σ = 862444800. Its totient is φ = 55640832.

The previous prime is 243430307. The next prime is 243430333. The reversal of 243430320 is 23034342.

It is an interprime number because it is at equal distance from previous prime (243430307) and next prime (243430333).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70770 + ... + 74129.

It is an arithmetic number, because the mean of its divisors is an integer number (10780560).

Almost surely, 2^243430320 is an apocalyptic number.

243430320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243430320 is an abundant number, since it is smaller than the sum of its proper divisors (619014480).

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

243430320 is a wasteful number, since it uses less digits than its factorization.

243430320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144922 (or 144916 counting only the distinct ones).

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

The square root of 243430320 is about 15602.2536833625. The cubic root of 243430320 is about 624.3932842909.

Adding to 243430320 its reverse (23034342), we get a palindrome (266464662).

The spelling of 243430320 in words is "two hundred forty-three million, four hundred thirty thousand, three hundred twenty".