198997080 has 32 divisors (see below), whose sum is σ = 596991600. Its totient is φ = 53065856.

The previous prime is 198997079. The next prime is 198997151. The reversal of 198997080 is 80799891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829035 + ... + 829274.

Almost surely, 2^198997080 is an apocalyptic number.

198997080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198997080 is an abundant number, since it is smaller than the sum of its proper divisors (397994520).

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

198997080 is a wasteful number, since it uses less digits than its factorization.

198997080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658323 (or 1658319 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 198997080 is about 14106.6324826303. The cubic root of 198997080 is about 583.8243904970.

The spelling of 198997080 in words is "one hundred ninety-eight million, nine hundred ninety-seven thousand, eighty".