198481728 has 28 divisors (see below), whose sum is σ = 525150080. Its totient is φ = 66160512.

The previous prime is 198481693. The next prime is 198481729. The reversal of 198481728 is 827184891.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198481729) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 516688 + ... + 517071.

It is an arithmetic number, because the mean of its divisors is an integer number (18755360).

Almost surely, 2^198481728 is an apocalyptic number.

It is an amenable number.

198481728 is an abundant number, since it is smaller than the sum of its proper divisors (326668352).

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

198481728 is a wasteful number, since it uses less digits than its factorization.

198481728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033774 (or 1033764 counting only the distinct ones).

The product of its digits is 258048, while the sum is 48.

The square root of 198481728 is about 14088.3543396665. The cubic root of 198481728 is about 583.3199690725.

The spelling of 198481728 in words is "one hundred ninety-eight million, four hundred eighty-one thousand, seven hundred twenty-eight".