243342440 has 32 divisors (see below), whose sum is σ = 597296160. Its totient is φ = 88488000.

The previous prime is 243342433. The next prime is 243342457. The reversal of 243342440 is 44243342.

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 7 ways as a sum of consecutive naturals, for example, 276086 + ... + 276965.

It is an arithmetic number, because the mean of its divisors is an integer number (18665505).

Almost surely, 2^243342440 is an apocalyptic number.

243342440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243342440 is an abundant number, since it is smaller than the sum of its proper divisors (353953720).

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

243342440 is a wasteful number, since it uses less digits than its factorization.

243342440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553073 (or 553069 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 243342440 is about 15599.4371693340. The cubic root of 243342440 is about 624.3181385077.

Adding to 243342440 its reverse (44243342), we get a palindrome (287585782).

The spelling of 243342440 in words is "two hundred forty-three million, three hundred forty-two thousand, four hundred forty".