198077172 has 12 divisors (see below), whose sum is σ = 462180096. Its totient is φ = 66025720.

The previous prime is 198077167. The next prime is 198077179. The reversal of 198077172 is 271770891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198077179) 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 3 ways as a sum of consecutive naturals, for example, 8253204 + ... + 8253227.

It is an arithmetic number, because the mean of its divisors is an integer number (38515008).

Almost surely, 2^198077172 is an apocalyptic number.

198077172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198077172 is an abundant number, since it is smaller than the sum of its proper divisors (264102924).

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

198077172 is a wasteful number, since it uses less digits than its factorization.

198077172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16506438 (or 16506436 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 42.

The square root of 198077172 is about 14073.9891999390. The cubic root of 198077172 is about 582.9233815875.

The spelling of 198077172 in words is "one hundred ninety-eight million, seventy-seven thousand, one hundred seventy-two".