198432057 has 8 divisors (see below), whose sum is σ = 270729184. Its totient is φ = 129211488.

The previous prime is 198432049. The next prime is 198432071. The reversal of 198432057 is 750234891.

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

It is not a de Polignac number, because 198432057 - 2³ = 198432049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198432037) 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 7 ways as a sum of consecutive naturals, for example, 768988 + ... + 769245.

It is an arithmetic number, because the mean of its divisors is an integer number (33841148).

Almost surely, 2^198432057 is an apocalyptic number.

It is an amenable number.

198432057 is a deficient number, since it is larger than the sum of its proper divisors (72297127).

198432057 is a wasteful number, since it uses less digits than its factorization.

198432057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538279.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 198432057 is about 14086.5913903968. The cubic root of 198432057 is about 583.2713054772.

The spelling of 198432057 in words is "one hundred ninety-eight million, four hundred thirty-two thousand, fifty-seven".