198085870 has 16 divisors (see below), whose sum is σ = 377528688. Its totient is φ = 74573440.

The previous prime is 198085859. The next prime is 198085879. The reversal of 198085870 is 78580891.

It is a self number, because there is not a number n which added to its sum of digits gives 198085870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198085879) 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, 582436 + ... + 582775.

It is an arithmetic number, because the mean of its divisors is an integer number (23595543).

Almost surely, 2^198085870 is an apocalyptic number.

198085870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198085870 is a deficient number, since it is larger than the sum of its proper divisors (179442818).

198085870 is a wasteful number, since it uses less digits than its factorization.

198085870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165235.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 198085870 is about 14074.2982063050. The cubic root of 198085870 is about 582.9319139410.

The spelling of 198085870 in words is "one hundred ninety-eight million, eighty-five thousand, eight hundred seventy".