198640996 has 6 divisors (see below), whose sum is σ = 347621750. Its totient is φ = 99320496.

The previous prime is 198640993. The next prime is 198641057. The reversal of 198640996 is 699046891.

198640996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 198528100 + 112896 = 14090^2 + 336^2 .

It is not an unprimeable number, because it can be changed into a prime (198640993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24830121 + ... + 24830128.

Almost surely, 2^198640996 is an apocalyptic number.

It is an amenable number.

198640996 is a deficient number, since it is larger than the sum of its proper divisors (148980754).

198640996 is a wasteful number, since it uses less digits than its factorization.

198640996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49660253 (or 49660251 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 198640996 is about 14094.0056761731. The cubic root of 198640996 is about 583.4759521397.

The spelling of 198640996 in words is "one hundred ninety-eight million, six hundred forty thousand, nine hundred ninety-six".