243238020 has 96 divisors (see below), whose sum is σ = 694407168. Its totient is φ = 63608832.

The previous prime is 243238013. The next prime is 243238027. The reversal of 243238020 is 20832342.

243238020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243238013) and next prime (243238027).

It is a super-3 number, since 3×243238020³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (243238027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1043824 + ... + 1044056.

It is an arithmetic number, because the mean of its divisors is an integer number (7233408).

Almost surely, 2^243238020 is an apocalyptic number.

243238020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243238020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347203584).

243238020 is an abundant number, since it is smaller than the sum of its proper divisors (451169148).

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

243238020 is a wasteful number, since it uses less digits than its factorization.

243238020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 243238020 is about 15596.0898945858. The cubic root of 243238020 is about 624.2288259229.

The spelling of 243238020 in words is "two hundred forty-three million, two hundred thirty-eight thousand, twenty".