243505938 has 32 divisors (see below), whose sum is σ = 552081600. Its totient is φ = 70981056.

The previous prime is 243505859. The next prime is 243505967. The reversal of 243505938 is 839505342.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 243505896 and 243505905.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 80673 + ... + 83636.

It is an arithmetic number, because the mean of its divisors is an integer number (17252550).

Almost surely, 2^243505938 is an apocalyptic number.

243505938 is an abundant number, since it is smaller than the sum of its proper divisors (308575662).

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

243505938 is a wasteful number, since it uses less digits than its factorization.

243505938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164346.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 243505938 is about 15604.6767989600. The cubic root of 243505938 is about 624.4579304195.

The spelling of 243505938 in words is "two hundred forty-three million, five hundred five thousand, nine hundred thirty-eight".