198455994 has 80 divisors (see below), whose sum is σ = 513729216. Its totient is φ = 56592000.

The previous prime is 198455993. The next prime is 198456053. The reversal of 198455994 is 499554891.

198455994 is a `hidden beast` number, since 1 + 9 + 8 + 45 + 599 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 198455994.

It is not an unprimeable number, because it can be changed into a prime (198455993) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27019 + ... + 33569.

Almost surely, 2^198455994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198455994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256864608).

198455994 is an abundant number, since it is smaller than the sum of its proper divisors (315273222).

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

198455994 is a wasteful number, since it uses less digits than its factorization.

198455994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593 (or 6584 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 198455994 is about 14087.4410025384. The cubic root of 198455994 is about 583.2947580115.

The spelling of 198455994 in words is "one hundred ninety-eight million, four hundred fifty-five thousand, nine hundred ninety-four".