243344340 has 36 divisors (see below), whose sum is σ = 738145044. Its totient is φ = 64891776.

The previous prime is 243344329. The next prime is 243344351. The reversal of 243344340 is 43443342.

243344340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243344329) and next prime (243344351).

It can be written as a sum of positive squares in 2 ways, for example, as 66879684 + 176464656 = 8178^2 + 13284^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675777 + ... + 676136.

It is an arithmetic number, because the mean of its divisors is an integer number (20504029).

Almost surely, 2^243344340 is an apocalyptic number.

243344340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243344340 is an abundant number, since it is smaller than the sum of its proper divisors (494800704).

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

243344340 is a wasteful number, since it uses less digits than its factorization.

243344340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351928 (or 1351923 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

The square root of 243344340 is about 15599.4980688482. The cubic root of 243344340 is about 624.3197633803.

Adding to 243344340 its reverse (43443342), we get a palindrome (286787682).

The spelling of 243344340 in words is "two hundred forty-three million, three hundred forty-four thousand, three hundred forty".