243249740 has 12 divisors (see below), whose sum is σ = 510824496. Its totient is φ = 97299888.

The previous prime is 243249733. The next prime is 243249751. The reversal of 243249740 is 47942342.

It is a self number, because there is not a number n which added to its sum of digits gives 243249740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6081224 + ... + 6081263.

It is an arithmetic number, because the mean of its divisors is an integer number (42568708).

Almost surely, 2^243249740 is an apocalyptic number.

243249740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243249740 is an abundant number, since it is smaller than the sum of its proper divisors (267574756).

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

243249740 is a wasteful number, since it uses less digits than its factorization.

243249740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12162496 (or 12162494 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 243249740 is about 15596.4656252627. The cubic root of 243249740 is about 624.2388515545.

The spelling of 243249740 in words is "two hundred forty-three million, two hundred forty-nine thousand, seven hundred forty".