197980 has 24 divisors (see below), whose sum is σ = 438480. Its totient is φ = 74880.

The previous prime is 197971. The next prime is 198013. The reversal of 197980 is 89791.

It is a congruent number.

It is an unprimeable number.

197980 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120 + ... + 640.

It is an arithmetic number, because the mean of its divisors is an integer number (18270).

2¹⁹⁷⁹⁸⁰ is an apocalyptic number.

197980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219240).

197980 is an abundant number, since it is smaller than the sum of its proper divisors (240500).

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

197980 is a wasteful number, since it uses less digits than its factorization.

197980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 197980 is about 444.9494353295. The cubic root of 197980 is about 58.2828043164.

The spelling of 197980 in words is "one hundred ninety-seven thousand, nine hundred eighty".