198487437984 has 384 divisors, whose sum is σ = 675113564160. Its totient is φ = 56126822400.

The previous prime is 198487437983. The next prime is 198487437991. The reversal of 198487437984 is 489734784891.

198487437984 is a `hidden beast` number, since 19 + 8 + 487 + 43 + 7 + 98 + 4 = 666.

198487437984 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 (72).

It is not an unprimeable number, because it can be changed into a prime (198487437983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8951199 + ... + 8973345.

It is an arithmetic number, because the mean of its divisors is an integer number (1758108240).

Almost surely, 2^198487437984 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 198487437984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337556782080).

198487437984 is an abundant number, since it is smaller than the sum of its proper divisors (476626126176).

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

198487437984 is a wasteful number, since it uses less digits than its factorization.

198487437984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241 (or 22227 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 72.

The spelling of 198487437984 in words is "one hundred ninety-eight billion, four hundred eighty-seven million, four hundred thirty-seven thousand, nine hundred eighty-four".