198872388 has 192 divisors, whose sum is σ = 617164800. Its totient is φ = 54587520.

The previous prime is 198872381. The next prime is 198872419. The reversal of 198872388 is 883278891.

198872388 is a `hidden beast` number, since 198 + 8 + 72 + 388 = 666.

198872388 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 not an unprimeable number, because it can be changed into a prime (198872381) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1219995 + ... + 1220157.

It is an arithmetic number, because the mean of its divisors is an integer number (3214400).

Almost surely, 2^198872388 is an apocalyptic number.

198872388 is a gapful number since it is divisible by the number (18) 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 198872388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308582400).

198872388 is an abundant number, since it is smaller than the sum of its proper divisors (418292412).

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

198872388 is a wasteful number, since it uses less digits than its factorization.

198872388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 271 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 198872388 is about 14102.2121668907. The cubic root of 198872388 is about 583.7024231439.

The spelling of 198872388 in words is "one hundred ninety-eight million, eight hundred seventy-two thousand, three hundred eighty-eight".