243340240 has 160 divisors (see below), whose sum is σ = 674956800. Its totient is φ = 80424960.

The previous prime is 243340213. The next prime is 243340267. The reversal of 243340240 is 42043342.

It is an interprime number because it is at equal distance from previous prime (243340213) and next prime (243340267).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1018041 + ... + 1018279.

It is an arithmetic number, because the mean of its divisors is an integer number (4218480).

Almost surely, 2^243340240 is an apocalyptic number.

243340240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243340240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337478400).

243340240 is an abundant number, since it is smaller than the sum of its proper divisors (431616560).

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

243340240 is a wasteful number, since it uses less digits than its factorization.

243340240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243340240 is about 15599.3666538100. The cubic root of 243340240 is about 624.3162570657.

Adding to 243340240 its reverse (42043342), we get a palindrome (285383582).

The spelling of 243340240 in words is "two hundred forty-three million, three hundred forty thousand, two hundred forty".