243256938 has 16 divisors (see below), whose sum is σ = 502208256. Its totient is φ = 78469920.

The previous prime is 243256933. The next prime is 243256957. The reversal of 243256938 is 839652342.

It is a self number, because there is not a number n which added to its sum of digits gives 243256938.

It is not an unprimeable number, because it can be changed into a prime (243256931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653731 + ... + 654102.

It is an arithmetic number, because the mean of its divisors is an integer number (31388016).

Almost surely, 2^243256938 is an apocalyptic number.

243256938 is an abundant number, since it is smaller than the sum of its proper divisors (258951318).

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

243256938 is a wasteful number, since it uses less digits than its factorization.

243256938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307869.

The product of its digits is 311040, while the sum is 42.

The square root of 243256938 is about 15596.6963809648. The cubic root of 243256938 is about 624.2450087751.

The spelling of 243256938 in words is "two hundred forty-three million, two hundred fifty-six thousand, nine hundred thirty-eight".