198084690 has 160 divisors (see below), whose sum is σ = 572552640. Its totient is φ = 48988800.

The previous prime is 198084673. The next prime is 198084727. The reversal of 198084690 is 96480891.

It is a super-2 number, since 2×198084690² = 78475088824792200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 938685 + ... + 938895.

It is an arithmetic number, because the mean of its divisors is an integer number (3578454).

Almost surely, 2^198084690 is an apocalyptic number.

198084690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198084690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286276320).

198084690 is an abundant number, since it is smaller than the sum of its proper divisors (374467950).

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

198084690 is a wasteful number, since it uses less digits than its factorization.

198084690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 198084690 is about 14074.2562858575. The cubic root of 198084690 is about 582.9307564278.

The spelling of 198084690 in words is "one hundred ninety-eight million, eighty-four thousand, six hundred ninety".