198437057 has 8 divisors (see below), whose sum is σ = 244230336. Its totient is φ = 157005072.

The previous prime is 198437033. The next prime is 198437059. The reversal of 198437057 is 750734891.

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

It is not a de Polignac number, because 198437057 - 2⁶ = 198436993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198436999 and 198437017.

It is not an unprimeable number, because it can be changed into a prime (198437059) 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, 1090223 + ... + 1090404.

It is an arithmetic number, because the mean of its divisors is an integer number (30528792).

Almost surely, 2^198437057 is an apocalyptic number.

It is an amenable number.

198437057 is a deficient number, since it is larger than the sum of its proper divisors (45793279).

198437057 is a wasteful number, since it uses less digits than its factorization.

198437057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180647.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 198437057 is about 14086.7688630147. The cubic root of 198437057 is about 583.2762044370.

The spelling of 198437057 in words is "one hundred ninety-eight million, four hundred thirty-seven thousand, fifty-seven".