198542238 has 16 divisors (see below), whose sum is σ = 397779600. Its totient is φ = 66064896.

The previous prime is 198542237. The next prime is 198542249. The reversal of 198542238 is 832245891.

It is a self number, because there is not a number n which added to its sum of digits gives 198542238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198542237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25213 + ... + 32136.

It is an arithmetic number, because the mean of its divisors is an integer number (24861225).

Almost surely, 2^198542238 is an apocalyptic number.

198542238 is an abundant number, since it is smaller than the sum of its proper divisors (199237362).

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

198542238 is a wasteful number, since it uses less digits than its factorization.

198542238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57931.

The product of its digits is 138240, while the sum is 42.

The square root of 198542238 is about 14090.5016944039. The cubic root of 198542238 is about 583.3792408678.

The spelling of 198542238 in words is "one hundred ninety-eight million, five hundred forty-two thousand, two hundred thirty-eight".