243650866 has 8 divisors (see below), whose sum is σ = 378079020. Its totient is φ = 117624528.

The previous prime is 243650863. The next prime is 243650873. The reversal of 243650866 is 668056342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 242892225 + 758641 = 15585^2 + 871^2 .

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 (243650863) 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, 2100381 + ... + 2100496.

Almost surely, 2^243650866 is an apocalyptic number.

243650866 is a deficient number, since it is larger than the sum of its proper divisors (134428154).

243650866 is a wasteful number, since it uses less digits than its factorization.

243650866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200908.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 243650866 is about 15609.3198442469. The cubic root of 243650866 is about 624.5817925465.

The spelling of 243650866 in words is "two hundred forty-three million, six hundred fifty thousand, eight hundred sixty-six".