198544544 has 72 divisors (see below), whose sum is σ = 439193664. Its totient is φ = 88246400.

The previous prime is 198544529. The next prime is 198544559. The reversal of 198544544 is 445445891.

It is an interprime number because it is at equal distance from previous prime (198544529) and next prime (198544559).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 198544495 and 198544504.

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 11 ways as a sum of consecutive naturals, for example, 181439 + ... + 182529.

It is an arithmetic number, because the mean of its divisors is an integer number (6099912).

Almost surely, 2^198544544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198544544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219596832).

198544544 is an abundant number, since it is smaller than the sum of its proper divisors (240649120).

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

198544544 is a wasteful number, since it uses less digits than its factorization.

198544544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1151 counting only the distinct ones).

The product of its digits is 460800, while the sum is 44.

The square root of 198544544 is about 14090.5835223386. The cubic root of 198544544 is about 583.3814994423.

The spelling of 198544544 in words is "one hundred ninety-eight million, five hundred forty-four thousand, five hundred forty-four".