243239680 has 36 divisors (see below), whose sum is σ = 582638112. Its totient is φ = 97295360.

The previous prime is 243239677. The next prime is 243239687. The reversal of 243239680 is 86932342.

243239680 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (243239687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93736 + ... + 96295.

It is an arithmetic number, because the mean of its divisors is an integer number (16184392).

Almost surely, 2^243239680 is an apocalyptic number.

243239680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243239680 is an abundant number, since it is smaller than the sum of its proper divisors (339398432).

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

243239680 is an equidigital number, since it uses as much as digits as its factorization.

243239680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190052 (or 190038 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 243239680 is about 15596.1431129623. The cubic root of 243239680 is about 624.2302459551.

The spelling of 243239680 in words is "two hundred forty-three million, two hundred thirty-nine thousand, six hundred eighty".