198776928 has 72 divisors (see below), whose sum is σ = 606993912. Its totient is φ = 56792064.

The previous prime is 198776899. The next prime is 198776939. The reversal of 198776928 is 829677891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16425 + ... + 25832.

It is an arithmetic number, because the mean of its divisors is an integer number (8430471).

Almost surely, 2^198776928 is an apocalyptic number.

It is an amenable number.

198776928 is an abundant number, since it is smaller than the sum of its proper divisors (408216984).

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

198776928 is a wasteful number, since it uses less digits than its factorization.

198776928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42284 (or 42269 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 57.

The square root of 198776928 is about 14098.8271852662. The cubic root of 198776928 is about 583.6090145824.

The spelling of 198776928 in words is "one hundred ninety-eight million, seven hundred seventy-six thousand, nine hundred twenty-eight".