243634340 has 24 divisors (see below), whose sum is σ = 538560960. Its totient is φ = 92324448.

The previous prime is 243634337. The next prime is 243634373. The reversal of 243634340 is 43436342.

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, 320192 + ... + 320951.

It is an arithmetic number, because the mean of its divisors is an integer number (22440040).

Almost surely, 2^243634340 is an apocalyptic number.

243634340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243634340 is an abundant number, since it is smaller than the sum of its proper divisors (294926620).

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

243634340 is a wasteful number, since it uses less digits than its factorization.

243634340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641171 (or 641169 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 243634340 is about 15608.7904720385. The cubic root of 243634340 is about 624.5676711491.

The spelling of 243634340 in words is "two hundred forty-three million, six hundred thirty-four thousand, three hundred forty".