243310340 has 96 divisors (see below), whose sum is σ = 643695360. Its totient is φ = 75188736.

The previous prime is 243310337. The next prime is 243310343. The reversal of 243310340 is 43013342.

It is an interprime number because it is at equal distance from previous prime (243310337) and next prime (243310343).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (243310343) 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 31 ways as a sum of consecutive naturals, for example, 76706 + ... + 79814.

It is an arithmetic number, because the mean of its divisors is an integer number (6705160).

Almost surely, 2^243310340 is an apocalyptic number.

243310340 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 243310340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321847680).

243310340 is an abundant number, since it is smaller than the sum of its proper divisors (400385020).

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

243310340 is a wasteful number, since it uses less digits than its factorization.

243310340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 243310340 is about 15598.4082521262. The cubic root of 243310340 is about 624.2906854344.

Adding to 243310340 its reverse (43013342), we get a palindrome (286323682).

The spelling of 243310340 in words is "two hundred forty-three million, three hundred ten thousand, three hundred forty".