242684638 has 16 divisors (see below), whose sum is σ = 434119680. Its totient is φ = 99485496.

The previous prime is 242684599. The next prime is 242684671. The reversal of 242684638 is 836486242.

It is a junction number, because it is equal to n+sod(n) for n = 242684594 and 242684603.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 376518 + ... + 377161.

It is an arithmetic number, because the mean of its divisors is an integer number (27132480).

Almost surely, 2^242684638 is an apocalyptic number.

242684638 is a deficient number, since it is larger than the sum of its proper divisors (191435042).

242684638 is a wasteful number, since it uses less digits than its factorization.

242684638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753711.

The product of its digits is 442368, while the sum is 43.

The square root of 242684638 is about 15578.3387432678. The cubic root of 242684638 is about 623.7550796839.

The spelling of 242684638 in words is "two hundred forty-two million, six hundred eighty-four thousand, six hundred thirty-eight".