198932728 has 8 divisors (see below), whose sum is σ = 372998880. Its totient is φ = 99466360.

The previous prime is 198932707. The next prime is 198932729. The reversal of 198932728 is 827239891.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198932729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12433288 + ... + 12433303.

It is an arithmetic number, because the mean of its divisors is an integer number (46624860).

Almost surely, 2^198932728 is an apocalyptic number.

It is an amenable number.

198932728 is a deficient number, since it is larger than the sum of its proper divisors (174066152).

198932728 is a wasteful number, since it uses less digits than its factorization.

198932728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24866597 (or 24866593 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 198932728 is about 14104.3513852995. The cubic root of 198932728 is about 583.7614510178.

The spelling of 198932728 in words is "one hundred ninety-eight million, nine hundred thirty-two thousand, seven hundred twenty-eight".