243388 has 12 divisors (see below), whose sum is σ = 432432. Its totient is φ = 119840.

The previous prime is 243367. The next prime is 243391. The reversal of 243388 is 883342.

It is a congruent number.

It is an unprimeable number.

243388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (36036).

2²⁴³³⁸⁸ is an apocalyptic number.

It is an amenable number.

243388 is a deficient number, since it is larger than the sum of its proper divisors (189044).

243388 is a wasteful number, since it uses less digits than its factorization.

243388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 930 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 243388 is about 493.3436935849. The cubic root of 243388 is about 62.4357098912.

The spelling of 243388 in words is "two hundred forty-three thousand, three hundred eighty-eight".