243789198 has 32 divisors (see below), whose sum is σ = 502854912. Its totient is φ = 78744000.

The previous prime is 243789193. The next prime is 243789199. The reversal of 243789198 is 891987342.

It is a super-2 number, since 2×243789198² = 118866346122966408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243789198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243789191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33865 + ... + 40427.

It is an arithmetic number, because the mean of its divisors is an integer number (15714216).

Almost surely, 2^243789198 is an apocalyptic number.

243789198 is an abundant number, since it is smaller than the sum of its proper divisors (259065714).

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

243789198 is a wasteful number, since it uses less digits than its factorization.

243789198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760.

The product of its digits is 870912, while the sum is 51.

The square root of 243789198 is about 15613.7502862061. The cubic root of 243789198 is about 624.6999716225.

The spelling of 243789198 in words is "two hundred forty-three million, seven hundred eighty-nine thousand, one hundred ninety-eight".