243734085 has 48 divisors (see below), whose sum is σ = 492710400. Its totient is φ = 111414240.

The previous prime is 243734069. The next prime is 243734087. The reversal of 243734085 is 580437342.

It is a happy number.

243734085 is a `hidden beast` number, since 243 + 7 + 3 + 408 + 5 = 666.

It is not a de Polignac number, because 243734085 - 2⁴ = 243734069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243734087) 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 47 ways as a sum of consecutive naturals, for example, 7540 + ... + 23330.

It is an arithmetic number, because the mean of its divisors is an integer number (10264800).

Almost surely, 2^243734085 is an apocalyptic number.

It is an amenable number.

243734085 is an abundant number, since it is smaller than the sum of its proper divisors (248976315).

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

243734085 is a wasteful number, since it uses less digits than its factorization.

243734085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15823 (or 15806 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 243734085 is about 15611.9852997625. The cubic root of 243734085 is about 624.6528931293.

The spelling of 243734085 in words is "two hundred forty-three million, seven hundred thirty-four thousand, eighty-five".