198857361 has 8 divisors (see below), whose sum is σ = 266122624. Its totient is φ = 132081840.

The previous prime is 198857359. The next prime is 198857371. The reversal of 198857361 is 163758891.

198857361 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 not a de Polignac number, because 198857361 - 2¹ = 198857359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198857361.

It is not an unprimeable number, because it can be changed into a prime (198857341) 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, 121486 + ... + 123111.

It is an arithmetic number, because the mean of its divisors is an integer number (33265328).

Almost surely, 2^198857361 is an apocalyptic number.

It is an amenable number.

198857361 is a deficient number, since it is larger than the sum of its proper divisors (67265263).

198857361 is a wasteful number, since it uses less digits than its factorization.

198857361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244871.

The product of its digits is 362880, while the sum is 48.

The square root of 198857361 is about 14101.6793680753. The cubic root of 198857361 is about 583.6877210572.

The spelling of 198857361 in words is "one hundred ninety-eight million, eight hundred fifty-seven thousand, three hundred sixty-one".