198551728 has 20 divisors (see below), whose sum is σ = 385354800. Its totient is φ = 99105344.

The previous prime is 198551711. The next prime is 198551737. The reversal of 198551728 is 827155891.

198551728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775 + ... + 19942.

It is an arithmetic number, because the mean of its divisors is an integer number (19267740).

Almost surely, 2^198551728 is an apocalyptic number.

It is an amenable number.

198551728 is a deficient number, since it is larger than the sum of its proper divisors (186803072).

198551728 is a wasteful number, since it uses less digits than its factorization.

198551728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21324 (or 21318 counting only the distinct ones).

The product of its digits is 201600, while the sum is 46.

The square root of 198551728 is about 14090.8384420516. The cubic root of 198551728 is about 583.3885355832.

The spelling of 198551728 in words is "one hundred ninety-eight million, five hundred fifty-one thousand, seven hundred twenty-eight".