243620256 has 96 divisors (see below), whose sum is σ = 700975296. Its totient is φ = 73472000.

The previous prime is 243620249. The next prime is 243620257. The reversal of 243620256 is 652026342.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (243620257) 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, 296326 + ... + 297146.

It is an arithmetic number, because the mean of its divisors is an integer number (7301826).

Almost surely, 2^243620256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243620256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350487648).

243620256 is an abundant number, since it is smaller than the sum of its proper divisors (457355040).

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

243620256 is a wasteful number, since it uses less digits than its factorization.

243620256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 243620256 is about 15608.3393094845. The cubic root of 243620256 is about 624.5556359265. Note that the first 3 decimals are identical.

Adding to 243620256 its reverse (652026342), we get a palindrome (895646598).

The spelling of 243620256 in words is "two hundred forty-three million, six hundred twenty thousand, two hundred fifty-six".