198485870 has 32 divisors (see below), whose sum is σ = 402333696. Its totient is φ = 69847200.

The previous prime is 198485851. The next prime is 198485873. The reversal of 198485870 is 78584891.

198485870 = 8133² + 8134² + 8135².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198485873) 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 15 ways as a sum of consecutive naturals, for example, 25694 + ... + 32513.

It is an arithmetic number, because the mean of its divisors is an integer number (12572928).

Almost surely, 2^198485870 is an apocalyptic number.

198485870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198485870 is an abundant number, since it is smaller than the sum of its proper divisors (203847826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198485870 is a wasteful number, since it uses less digits than its factorization.

198485870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58256.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 198485870 is about 14088.5013397451. The cubic root of 198485870 is about 583.3240266996.

The spelling of 198485870 in words is "one hundred ninety-eight million, four hundred eighty-five thousand, eight hundred seventy".