198078238 has 8 divisors (see below), whose sum is σ = 297723960. Its totient is φ = 98836920.

The previous prime is 198078161. The next prime is 198078239. The reversal of 198078238 is 832870891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198078239) 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, 99873 + ... + 101836.

It is an arithmetic number, because the mean of its divisors is an integer number (37215495).

Almost surely, 2^198078238 is an apocalyptic number.

198078238 is a deficient number, since it is larger than the sum of its proper divisors (99645722).

198078238 is a wasteful number, since it uses less digits than its factorization.

198078238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202202.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 198078238 is about 14074.0270711691. The cubic root of 198078238 is about 582.9244272998.

The spelling of 198078238 in words is "one hundred ninety-eight million, seventy-eight thousand, two hundred thirty-eight".