243638946 has 24 divisors (see below), whose sum is σ = 540162480. Its totient is φ = 79324056.

The previous prime is 243638921. The next prime is 243638963. The reversal of 243638946 is 649836342.

243638946 is a `hidden beast` number, since 2 + 4 + 3 + 638 + 9 + 4 + 6 = 666.

243638946 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156616 + ... + 158163.

It is an arithmetic number, because the mean of its divisors is an integer number (22506770).

Almost surely, 2^243638946 is an apocalyptic number.

243638946 is an abundant number, since it is smaller than the sum of its proper divisors (296523534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243638946 is a wasteful number, since it uses less digits than its factorization.

243638946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314830 (or 314827 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 243638946 is about 15608.9380164059. The cubic root of 243638946 is about 624.5716070209.

The spelling of 243638946 in words is "two hundred forty-three million, six hundred thirty-eight thousand, nine hundred forty-six".