243040388 has 24 divisors (see below), whose sum is σ = 430227840. Its totient is φ = 120126240.

The previous prime is 243040373. The next prime is 243040393. The reversal of 243040388 is 883040342.

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, 149870 + ... + 151482.

It is an arithmetic number, because the mean of its divisors is an integer number (17926160).

Almost surely, 2^243040388 is an apocalyptic number.

It is an amenable number.

243040388 is a deficient number, since it is larger than the sum of its proper divisors (187187452).

243040388 is a wasteful number, since it uses less digits than its factorization.

243040388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 243040388 is about 15589.7526600007. The cubic root of 243040388 is about 624.0597171919.

The spelling of 243040388 in words is "two hundred forty-three million, forty thousand, three hundred eighty-eight".