198640930 has 16 divisors (see below), whose sum is σ = 362891520. Its totient is φ = 78270192.

The previous prime is 198640927. The next prime is 198640993. The reversal of 198640930 is 39046891.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 147570 + ... + 148909.

It is an arithmetic number, because the mean of its divisors is an integer number (22680720).

Almost surely, 2^198640930 is an apocalyptic number.

198640930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198640930 is a deficient number, since it is larger than the sum of its proper divisors (164250590).

198640930 is a wasteful number, since it uses less digits than its factorization.

198640930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296553.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 198640930 is about 14094.0033347520. The cubic root of 198640930 is about 583.4758875182.

The spelling of 198640930 in words is "one hundred ninety-eight million, six hundred forty thousand, nine hundred thirty".