243606240 has 144 divisors (see below), whose sum is σ = 837109728. Its totient is φ = 64508928.

The previous prime is 243606229. The next prime is 243606241. The reversal of 243606240 is 42606342.

243606240 is a `hidden beast` number, since 2 + 4 + 36 + 0 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243606241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239974 + ... + 240986.

It is an arithmetic number, because the mean of its divisors is an integer number (5813262).

Almost surely, 2^243606240 is an apocalyptic number.

243606240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243606240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418554864).

243606240 is an abundant number, since it is smaller than the sum of its proper divisors (593503488).

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

243606240 is a wasteful number, since it uses less digits than its factorization.

243606240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 243606240 is about 15607.8903122748. The cubic root of 243606240 is about 624.5436583514.

The spelling of 243606240 in words is "two hundred forty-three million, six hundred six thousand, two hundred forty".