243021028 has 12 divisors (see below), whose sum is σ = 439005952. Its totient is φ = 117590760.

The previous prime is 243021017. The next prime is 243021029. The reversal of 243021028 is 820120342.

It is not an unprimeable number, because it can be changed into a prime (243021029) 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, 979800 + ... + 980047.

Almost surely, 2^243021028 is an apocalyptic number.

It is an amenable number.

243021028 is a deficient number, since it is larger than the sum of its proper divisors (195984924).

243021028 is a wasteful number, since it uses less digits than its factorization.

243021028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959882 (or 1959880 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 243021028 is about 15589.1317269436. The cubic root of 243021028 is about 624.0431463975.

The spelling of 243021028 in words is "two hundred forty-three million, twenty-one thousand, twenty-eight".