243953842 has 16 divisors (see below), whose sum is σ = 422680032. Its totient is φ = 104365120.

The previous prime is 243953821. The next prime is 243953861. The reversal of 243953842 is 248359342.

It is a junction number, because it is equal to n+sod(n) for n = 243953795 and 243953804.

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 7 ways as a sum of consecutive naturals, for example, 325768 + ... + 326515.

It is an arithmetic number, because the mean of its divisors is an integer number (26417502).

Almost surely, 2^243953842 is an apocalyptic number.

243953842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243953842 is a deficient number, since it is larger than the sum of its proper divisors (178726190).

243953842 is a wasteful number, since it uses less digits than its factorization.

243953842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652313.

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

The square root of 243953842 is about 15619.0218003561. The cubic root of 243953842 is about 624.8405711754.

The spelling of 243953842 in words is "two hundred forty-three million, nine hundred fifty-three thousand, eight hundred forty-two".