198057 has 8 divisors (see below), whose sum is σ = 266976. Its totient is φ = 130592.

The previous prime is 198047. The next prime is 198073. The reversal of 198057 is 750891.

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 198057 - 2¹⁰ = 197033 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198057.

It is not an unprimeable number, because it can be changed into a prime (198017) 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, 13 + ... + 629.

It is an arithmetic number, because the mean of its divisors is an integer number (33372).

2¹⁹⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

198057 is a deficient number, since it is larger than the sum of its proper divisors (68919).

198057 is a wasteful number, since it uses less digits than its factorization.

198057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 198057 is about 445.0359536038. The cubic root of 198057 is about 58.2903592786.

The spelling of 198057 in words is "one hundred ninety-eight thousand, fifty-seven".