243078 has 32 divisors (see below), whose sum is σ = 552960. Its totient is φ = 70560.

The previous prime is 243077. The next prime is 243091. The reversal of 243078 is 870342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2²⁴³⁰⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276480).

243078 is an abundant number, since it is smaller than the sum of its proper divisors (309882).

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

243078 is a wasteful number, since it uses less digits than its factorization.

243078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 243078 is about 493.0294108874. The cubic root of 243078 is about 62.4091907896.

Subtracting 243078 from its reverse (870342), we obtain a square (627264 = 792²).

The spelling of 243078 in words is "two hundred forty-three thousand, seventy-eight".