243033394 has 36 divisors (see below), whose sum is σ = 397192302. Its totient is φ = 111498240.

The previous prime is 243033391. The next prime is 243033409. The reversal of 243033394 is 493330342.

It can be written as a sum of positive squares in 9 ways, for example, as 13965169 + 229068225 = 3737^2 + 15135^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243033391) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2150682 + ... + 2150794.

Almost surely, 2^243033394 is an apocalyptic number.

243033394 is a deficient number, since it is larger than the sum of its proper divisors (154158908).

243033394 is a wasteful number, since it uses less digits than its factorization.

243033394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 31.

The square root of 243033394 is about 15589.5283443727. The cubic root of 243033394 is about 624.0537309228.

The spelling of 243033394 in words is "two hundred forty-three million, thirty-three thousand, three hundred ninety-four".