198084390 has 64 divisors (see below), whose sum is σ = 544444416. Its totient is φ = 45182592.

The previous prime is 198084377. The next prime is 198084437. The reversal of 198084390 is 93480891.

198084390 is digitally balanced in base 3, 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 (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180684 + ... + 181776.

It is an arithmetic number, because the mean of its divisors is an integer number (8506944).

Almost surely, 2^198084390 is an apocalyptic number.

198084390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198084390 is an abundant number, since it is smaller than the sum of its proper divisors (346360026).

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

198084390 is a wasteful number, since it uses less digits than its factorization.

198084390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 198084390 is about 14074.2456280967. The cubic root of 198084390 is about 582.9304621440.

The spelling of 198084390 in words is "one hundred ninety-eight million, eighty-four thousand, three hundred ninety".