243770642 has 8 divisors (see below), whose sum is σ = 365955276. Its totient is φ = 121785552.

The previous prime is 243770641. The next prime is 243770663. The reversal of 243770642 is 246077342.

It can be written as a sum of positive squares in 2 ways, for example, as 227376241 + 16394401 = 15079^2 + 4049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (243770641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46793 + ... + 51740.

Almost surely, 2^243770642 is an apocalyptic number.

243770642 is a deficient number, since it is larger than the sum of its proper divisors (122184634).

243770642 is a wasteful number, since it uses less digits than its factorization.

243770642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99772.

The product of its (nonzero) digits is 56448, while the sum is 35.

The square root of 243770642 is about 15613.1560550710. The cubic root of 243770642 is about 624.6841215535.

The spelling of 243770642 in words is "two hundred forty-three million, seven hundred seventy thousand, six hundred forty-two".