198771888 has 240 divisors, whose sum is σ = 657815040. Its totient is φ = 50552832.

The previous prime is 198771841. The next prime is 198771893. The reversal of 198771888 is 888177891.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2233348 + ... + 2233436.

It is an arithmetic number, because the mean of its divisors is an integer number (2740896).

Almost surely, 2^198771888 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 198771888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328907520).

198771888 is an abundant number, since it is smaller than the sum of its proper divisors (459043152).

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

198771888 is a wasteful number, since it uses less digits than its factorization.

198771888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 141 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 57.

The square root of 198771888 is about 14098.6484458618. The cubic root of 198771888 is about 583.6040820611.

The spelling of 198771888 in words is "one hundred ninety-eight million, seven hundred seventy-one thousand, eight hundred eighty-eight".