198800056 has 64 divisors (see below), whose sum is σ = 468216000. Its totient is φ = 78632064.

The previous prime is 198800053. The next prime is 198800081. The reversal of 198800056 is 650008891.

It is a junction number, because it is equal to n+sod(n) for n = 198799988 and 198800024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198800053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32886 + ... + 38458.

It is an arithmetic number, because the mean of its divisors is an integer number (7315875).

Almost surely, 2^198800056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198800056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234108000).

198800056 is an abundant number, since it is smaller than the sum of its proper divisors (269415944).

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

198800056 is a wasteful number, since it uses less digits than its factorization.

198800056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613 (or 5595 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 198800056 is about 14099.6473714771. The cubic root of 198800056 is about 583.6316483055.

The spelling of 198800056 in words is "one hundred ninety-eight million, eight hundred thousand, fifty-six".