197197980 has 96 divisors (see below), whose sum is σ = 636174336. Its totient is φ = 44706816.

The previous prime is 197197969. The next prime is 197197981. The reversal of 197197980 is 89791791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197197981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51492 + ... + 55188.

It is an arithmetic number, because the mean of its divisors is an integer number (6626816).

Almost surely, 2^197197980 is an apocalyptic number.

197197980 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 197197980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318087168).

197197980 is an abundant number, since it is smaller than the sum of its proper divisors (438976356).

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

197197980 is a wasteful number, since it uses less digits than its factorization.

197197980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843 (or 3841 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 197197980 is about 14042.7198220288. The cubic root of 197197980 is about 582.0596412705.

The spelling of 197197980 in words is "one hundred ninety-seven million, one hundred ninety-seven thousand, nine hundred eighty".