243438 has 16 divisors (see below), whose sum is σ = 524496. Its totient is φ = 74880.

The previous prime is 243437. The next prime is 243461. The reversal of 243438 is 834342.

It is a d-powerful number, because it can be written as 2 + 4² + 4⁸ + 3⁶ + 3¹¹ + 8 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243438.

It is not an unprimeable number, because it can be changed into a prime (243431) by changing a digit.

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, 1483 + ... + 1638.

It is an arithmetic number, because the mean of its divisors is an integer number (32781).

2²⁴³⁴³⁸ is an apocalyptic number.

243438 is an abundant number, since it is smaller than the sum of its proper divisors (281058).

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

243438 is a wasteful number, since it uses less digits than its factorization.

243438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139.

The product of its digits is 2304, while the sum is 24.

The square root of 243438 is about 493.3943655941. The cubic root of 243438 is about 62.4399850564.

The spelling of 243438 in words is "two hundred forty-three thousand, four hundred thirty-eight".