243008 has 14 divisors (see below), whose sum is σ = 482346. Its totient is φ = 121472.

The previous prime is 242999. The next prime is 243011. The reversal of 243008 is 800342.

It can be written as a sum of positive squares in only one way, i.e., 135424 + 107584 = 368^2 + 328^2 .

It is a congruent number.

It is an unprimeable number.

243008 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 as a sum of consecutive naturals, namely, 1835 + ... + 1962.

2²⁴³⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

243008 is a deficient number, since it is larger than the sum of its proper divisors (239338).

243008 is an equidigital number, since it uses as much as digits as its factorization.

243008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 243008 is about 492.9584160961. The cubic root of 243008 is about 62.4031994853.

The spelling of 243008 in words is "two hundred forty-three thousand, eight".