198728194 has 8 divisors (see below), whose sum is σ = 340676928. Its totient is φ = 85169220.

The previous prime is 198728191. The next prime is 198728209. The reversal of 198728194 is 491827891.

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

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (198728191) 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, 7097422 + ... + 7097449.

It is an arithmetic number, because the mean of its divisors is an integer number (42584616).

Almost surely, 2^198728194 is an apocalyptic number.

198728194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

198728194 is a deficient number, since it is larger than the sum of its proper divisors (141948734).

198728194 is a wasteful number, since it uses less digits than its factorization.

198728194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14194880.

The product of its digits is 290304, while the sum is 49.

The square root of 198728194 is about 14097.0987795362. The cubic root of 198728194 is about 583.5613163466.

The spelling of 198728194 in words is "one hundred ninety-eight million, seven hundred twenty-eight thousand, one hundred ninety-four".