198371916 has 30 divisors (see below), whose sum is σ = 518584220. Its totient is φ = 66123864.

The previous prime is 198371881. The next prime is 198371959. The reversal of 198371916 is 619173891.

198371916 is a `hidden beast` number, since 198 + 371 + 91 + 6 = 666.

It is a super-2 number, since 2×198371916² = 78702834115022112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 305806 + ... + 306453.

Almost surely, 2^198371916 is an apocalyptic number.

It is an amenable number.

198371916 is an abundant number, since it is smaller than the sum of its proper divisors (320212304).

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

198371916 is a wasteful number, since it uses less digits than its factorization.

198371916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612275 (or 612264 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 198371916 is about 14084.4565390362. The cubic root of 198371916 is about 583.2123733594.

The spelling of 198371916 in words is "one hundred ninety-eight million, three hundred seventy-one thousand, nine hundred sixteen".