243273344 has 32 divisors (see below), whose sum is σ = 501365700. Its totient is φ = 117440512.

The previous prime is 243273319. The next prime is 243273361. The reversal of 243273344 is 443372342.

It can be written as a sum of positive squares in 2 ways, for example, as 206209600 + 37063744 = 14360^2 + 6088^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 243273344.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29057 + ... + 36480.

Almost surely, 2^243273344 is an apocalyptic number.

It is an amenable number.

243273344 is an abundant number, since it is smaller than the sum of its proper divisors (258092356).

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

243273344 is an equidigital number, since it uses as much as digits as its factorization.

243273344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65580 (or 65568 counting only the distinct ones).

The product of its digits is 48384, while the sum is 32.

The square root of 243273344 is about 15597.2223168101. Note that the first 3 decimals coincide. The cubic root of 243273344 is about 624.2590421308.

The spelling of 243273344 in words is "two hundred forty-three million, two hundred seventy-three thousand, three hundred forty-four".