198774 has 24 divisors (see below), whose sum is σ = 447720.
Its totient is φ = 66096.
The previous prime is 198769. The next prime is 198811. The reversal of 198774 is 477891.
It can be divided in two parts, 19877 and 4, that added together give a square (19881 = 1412).
It is a super-2 number, since 2×1987742 = 79022206152, which contains 22 as substring.
It is a Curzon number.
It is a zygodrome in base 5.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282 + ... + 690.
It is an arithmetic number, because the mean of its divisors is an integer number (18655).
2198774 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 198774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223860).
198774 is an abundant number, since it is smaller than the sum of its proper divisors (248946).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
198774 is an equidigital number, since it uses as much as digits as its factorization.
198774 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 426 (or 414 counting only the distinct ones).
The product of its digits is 14112, while the sum is 36.
The square root of 198774 is about 445.8407787540.
The cubic root of 198774 is about 58.3606149033.
The spelling of 198774 in words is "one hundred ninety-eight thousand, seven hundred seventy-four".