243450320 has 20 divisors (see below), whose sum is σ = 566022180. Its totient is φ = 97380096.

The previous prime is 243450289. The next prime is 243450341. The reversal of 243450320 is 23054342.

It can be written as a sum of positive squares in 2 ways, for example, as 25120144 + 218330176 = 5012^2 + 14776^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1521485 + ... + 1521644.

It is an arithmetic number, because the mean of its divisors is an integer number (28301109).

Almost surely, 2^243450320 is an apocalyptic number.

243450320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243450320 is an abundant number, since it is smaller than the sum of its proper divisors (322571860).

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

243450320 is a wasteful number, since it uses less digits than its factorization.

243450320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043142 (or 3043136 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 243450320 is about 15602.8946032459. The cubic root of 243450320 is about 624.4103836724.

The spelling of 243450320 in words is "two hundred forty-three million, four hundred fifty thousand, three hundred twenty".