243047680 has 36 divisors (see below), whose sum is σ = 582178212. Its totient is φ = 97218560.

The previous prime is 243047641. The next prime is 243047689. The reversal of 243047680 is 86740342.

It can be written as a sum of positive squares in 2 ways, for example, as 94012416 + 149035264 = 9696^2 + 12208^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243047689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93661 + ... + 96220.

It is an arithmetic number, because the mean of its divisors is an integer number (16171617).

Almost surely, 2^243047680 is an apocalyptic number.

243047680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243047680 is an abundant number, since it is smaller than the sum of its proper divisors (339130532).

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

243047680 is an equidigital number, since it uses as much as digits as its factorization.

243047680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189902 (or 189888 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 243047680 is about 15589.9865298210. The cubic root of 243047680 is about 624.0659584014.

The spelling of 243047680 in words is "two hundred forty-three million, forty-seven thousand, six hundred eighty".