243922788 has 18 divisors (see below), whose sum is σ = 616582694. Its totient is φ = 81307584.

The previous prime is 243922781. The next prime is 243922829. The reversal of 243922788 is 887229342.

It can be written as a sum of positive squares in only one way, i.e., 242051364 + 1871424 = 15558^2 + 1368^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (243922781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3387781 + ... + 3387852.

Almost surely, 2^243922788 is an apocalyptic number.

It is an amenable number.

243922788 is an abundant number, since it is smaller than the sum of its proper divisors (372659906).

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

243922788 is a wasteful number, since it uses less digits than its factorization.

243922788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775643 (or 6775638 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 243922788 is about 15618.0276603674. The cubic root of 243922788 is about 624.8140571125.

The spelling of 243922788 in words is "two hundred forty-three million, nine hundred twenty-two thousand, seven hundred eighty-eight".