198198546 has 128 divisors (see below), whose sum is σ = 523708416. Its totient is φ = 48522240.

The previous prime is 198198541. The next prime is 198198587. The reversal of 198198546 is 645891891.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (198198541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1215861 + ... + 1216023.

It is an arithmetic number, because the mean of its divisors is an integer number (4091472).

Almost surely, 2^198198546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198198546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261854208).

198198546 is an abundant number, since it is smaller than the sum of its proper divisors (325509870).

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

198198546 is a wasteful number, since it uses less digits than its factorization.

198198546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336.

The product of its digits is 622080, while the sum is 51.

The square root of 198198546 is about 14078.3005366415. The cubic root of 198198546 is about 583.0424215479.

The spelling of 198198546 in words is "one hundred ninety-eight million, one hundred ninety-eight thousand, five hundred forty-six".