243400042 has 8 divisors (see below), whose sum is σ = 365258016. Its totient is φ = 121647372.

The previous prime is 243399997. The next prime is 243400043. The reversal of 243400042 is 240004342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 243399992 and 243400019.

It is not an unprimeable number, because it can be changed into a prime (243400043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20268 + ... + 29959.

It is an arithmetic number, because the mean of its divisors is an integer number (45657252).

Almost surely, 2^243400042 is an apocalyptic number.

243400042 is a deficient number, since it is larger than the sum of its proper divisors (121857974).

243400042 is a wasteful number, since it uses less digits than its factorization.

243400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52652.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 243400042 is about 15601.2833446483. The cubic root of 243400042 is about 624.3673957550.

Adding to 243400042 its reverse (240004342), we get a palindrome (483404384).

The spelling of 243400042 in words is "two hundred forty-three million, four hundred thousand, forty-two".