243240444 has 18 divisors (see below), whose sum is σ = 614857880. Its totient is φ = 81080136.

The previous prime is 243240419. The next prime is 243240469. The reversal of 243240444 is 444042342.

It is a happy number.

243240444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243240419) and next prime (243240469).

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3378304 + ... + 3378375.

Almost surely, 2^243240444 is an apocalyptic number.

It is an amenable number.

243240444 is an abundant number, since it is smaller than the sum of its proper divisors (371617436).

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

243240444 is a wasteful number, since it uses less digits than its factorization.

243240444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756689 (or 6756684 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 243240444 is about 15596.1676061781. The cubic root of 243240444 is about 624.2308995100.

Adding to 243240444 its reverse (444042342), we get a palindrome (687282786).

The spelling of 243240444 in words is "two hundred forty-three million, two hundred forty thousand, four hundred forty-four".