243909342 has 48 divisors (see below), whose sum is σ = 555909120. Its totient is φ = 77139216.

The previous prime is 243909307. The next prime is 243909349.

243909342 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×243909342² = 118983534229745928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243909297 and 243909306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243909349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50259 + ... + 54897.

It is an arithmetic number, because the mean of its divisors is an integer number (11581440).

Almost surely, 2^243909342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243909342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277954560).

243909342 is an abundant number, since it is smaller than the sum of its proper divisors (311999778).

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

243909342 is a wasteful number, since it uses less digits than its factorization.

243909342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797 (or 4794 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 243909342 is about 15617.5971903491. The cubic root of 243909342 is about 624.8025761514.

The spelling of 243909342 in words is "two hundred forty-three million, nine hundred nine thousand, three hundred forty-two".