198039856 has 40 divisors (see below), whose sum is σ = 443061920. Its totient is φ = 83994624.

The previous prime is 198039791. The next prime is 198039857. The reversal of 198039856 is 658930891.

It is not an unprimeable number, because it can be changed into a prime (198039857) 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, 1750 + ... + 19978.

It is an arithmetic number, because the mean of its divisors is an integer number (11076548).

Almost surely, 2^198039856 is an apocalyptic number.

198039856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198039856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221530960).

198039856 is an abundant number, since it is smaller than the sum of its proper divisors (245022064).

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

198039856 is a wasteful number, since it uses less digits than its factorization.

198039856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18341 (or 18335 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 198039856 is about 14072.6634295005. The cubic root of 198039856 is about 582.8867734062.

The spelling of 198039856 in words is "one hundred ninety-eight million, thirty-nine thousand, eight hundred fifty-six".