198728856 has 64 divisors (see below), whose sum is σ = 556080000. Its totient is φ = 65756448.

The previous prime is 198728839. The next prime is 198728857. The reversal of 198728856 is 658827891.

198728856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198728857) 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, 26715 + ... + 33333.

It is an arithmetic number, because the mean of its divisors is an integer number (8688750).

Almost surely, 2^198728856 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 198728856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278040000).

198728856 is an abundant number, since it is smaller than the sum of its proper divisors (357351144).

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

198728856 is a wasteful number, since it uses less digits than its factorization.

198728856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6773 (or 6763 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 198728856 is about 14097.1222595252. The cubic root of 198728856 is about 583.5619643290.

The spelling of 198728856 in words is "one hundred ninety-eight million, seven hundred twenty-eight thousand, eight hundred fifty-six".