243655428 has 12 divisors (see below), whose sum is σ = 568529360. Its totient is φ = 81218472.

The previous prime is 243655421. The next prime is 243655499. The reversal of 243655428 is 824556342.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (243655421) 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, 10152298 + ... + 10152321.

Almost surely, 2^243655428 is an apocalyptic number.

It is an amenable number.

243655428 is an abundant number, since it is smaller than the sum of its proper divisors (324873932).

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

243655428 is a wasteful number, since it uses less digits than its factorization.

243655428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20304626 (or 20304624 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The square root of 243655428 is about 15609.4659742094. The cubic root of 243655428 is about 624.5856906438.

The spelling of 243655428 in words is "two hundred forty-three million, six hundred fifty-five thousand, four hundred twenty-eight".