243207228 has 24 divisors (see below), whose sum is σ = 619073280. Its totient is φ = 73699120.

The previous prime is 243207197. The next prime is 243207241. The reversal of 243207228 is 822702342.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 243207195 and 243207204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921108 + ... + 921371.

It is an arithmetic number, because the mean of its divisors is an integer number (25794720).

Almost surely, 2^243207228 is an apocalyptic number.

It is an amenable number.

243207228 is an abundant number, since it is smaller than the sum of its proper divisors (375866052).

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

243207228 is a wasteful number, since it uses less digits than its factorization.

243207228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842497 (or 1842495 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 243207228 is about 15595.1026928328. The cubic root of 243207228 is about 624.2024840087.

The spelling of 243207228 in words is "two hundred forty-three million, two hundred seven thousand, two hundred twenty-eight".