198009846 has 40 divisors (see below), whose sum is σ = 469794600. Its totient is φ = 62119872.

The previous prime is 198009769. The next prime is 198009853. The reversal of 198009846 is 648900891.

It is a super-2 number, since 2×198009846² = 78415798225887432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33196 + ... + 38703.

It is an arithmetic number, because the mean of its divisors is an integer number (11744865).

Almost surely, 2^198009846 is an apocalyptic number.

198009846 is an abundant number, since it is smaller than the sum of its proper divisors (271784754).

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

198009846 is a wasteful number, since it uses less digits than its factorization.

198009846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71930 (or 71921 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 198009846 is about 14071.5971374965. The cubic root of 198009846 is about 582.8573293067.

It can be divided in two parts, 19800 and 9846, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 198009846 in words is "one hundred ninety-eight million, nine thousand, eight hundred forty-six".