198396594 has 64 divisors (see below), whose sum is σ = 506304000. Its totient is φ = 56952720.

The previous prime is 198396593. The next prime is 198396599. The reversal of 198396594 is 495693891.

198396594 is a `hidden beast` number, since 19 + 8 + 39 + 6 + 594 = 666.

It is a super-2 number, since 2×198396594² = 78722417021601672, which contains 22 as substring.

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 198396594.

It is not an unprimeable number, because it can be changed into a prime (198396593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2497 + ... + 20075.

It is an arithmetic number, because the mean of its divisors is an integer number (7911000).

Almost surely, 2^198396594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198396594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253152000).

198396594 is an abundant number, since it is smaller than the sum of its proper divisors (307907406).

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

198396594 is a wasteful number, since it uses less digits than its factorization.

198396594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17620 (or 17614 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 198396594 is about 14085.3325839328. The cubic root of 198396594 is about 583.2365567526.

The spelling of 198396594 in words is "one hundred ninety-eight million, three hundred ninety-six thousand, five hundred ninety-four".