198085381 has 8 divisors (see below), whose sum is σ = 220204544. Its totient is φ = 176949360.

The previous prime is 198085367. The next prime is 198085387. The reversal of 198085381 is 183580891.

198085381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 198085381 - 2²¹ = 195988229 is a prime.

It is a super-2 number, since 2×198085381² = 78475636331830322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198085387) 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, 245361 + ... + 246166.

It is an arithmetic number, because the mean of its divisors is an integer number (27525568).

Almost surely, 2^198085381 is an apocalyptic number.

It is an amenable number.

198085381 is a deficient number, since it is larger than the sum of its proper divisors (22119163).

198085381 is a wasteful number, since it uses less digits than its factorization.

198085381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491571.

The product of its (nonzero) digits is 69120, while the sum is 43.

The square root of 198085381 is about 14074.2808342025. The cubic root of 198085381 is about 582.9314342602.

The spelling of 198085381 in words is "one hundred ninety-eight million, eighty-five thousand, three hundred eighty-one".