198606920 has 32 divisors (see below), whose sum is σ = 473153400. Its totient is φ = 74769408.

The previous prime is 198606917. The next prime is 198606973. The reversal of 198606920 is 29606891.

It can be written as a sum of positive squares in 4 ways, for example, as 187087684 + 11519236 = 13678^2 + 3394^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145355 + ... + 146714.

Almost surely, 2^198606920 is an apocalyptic number.

198606920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198606920 is an abundant number, since it is smaller than the sum of its proper divisors (274546480).

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

198606920 is a wasteful number, since it uses less digits than its factorization.

198606920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292097 (or 292093 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 198606920 is about 14092.7967415982. The cubic root of 198606920 is about 583.4425859767.

The spelling of 198606920 in words is "one hundred ninety-eight million, six hundred six thousand, nine hundred twenty".