243730 has 8 divisors (see below), whose sum is σ = 438732. Its totient is φ = 97488.

The previous prime is 243709. The next prime is 243769. The reversal of 243730 is 37342.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 6561 = 487^2 + 81^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 243698 and 243707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12177 + ... + 12196.

2²⁴³⁷³⁰ is an apocalyptic number.

243730 is a deficient number, since it is larger than the sum of its proper divisors (195002).

243730 is a wasteful number, since it uses less digits than its factorization.

243730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24380.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 243730 is about 493.6901862504. The cubic root of 243730 is about 62.4649403368.

The spelling of 243730 in words is "two hundred forty-three thousand, seven hundred thirty".