243020889 has 24 divisors (see below), whose sum is σ = 357864000. Its totient is φ = 158876640.

The previous prime is 243020867. The next prime is 243020891. The reversal of 243020889 is 988020342.

It is not a de Polignac number, because 243020889 - 2⁵ = 243020857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243020809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328482 + ... + 329220.

It is an arithmetic number, because the mean of its divisors is an integer number (14911000).

Almost surely, 2^243020889 is an apocalyptic number.

It is an amenable number.

243020889 is a deficient number, since it is larger than the sum of its proper divisors (114843111).

243020889 is a wasteful number, since it uses less digits than its factorization.

243020889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 243020889 is about 15589.1272687088. The cubic root of 243020889 is about 624.0430274201.

The spelling of 243020889 in words is "two hundred forty-three million, twenty thousand, eight hundred eighty-nine".