197217680 has 80 divisors (see below), whose sum is σ = 529680384. Its totient is φ = 67491840.

The previous prime is 197217679. The next prime is 197217689. The reversal of 197217680 is 86712791.

197217680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (197217689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8369 + ... + 21551.

Almost surely, 2^197217680 is an apocalyptic number.

197217680 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 197217680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264840192).

197217680 is an abundant number, since it is smaller than the sum of its proper divisors (332462704).

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

197217680 is a wasteful number, since it uses less digits than its factorization.

197217680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13224 (or 13218 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 197217680 is about 14043.4212355822. The cubic root of 197217680 is about 582.0790231342.

The spelling of 197217680 in words is "one hundred ninety-seven million, two hundred seventeen thousand, six hundred eighty".