197578668 has 96 divisors (see below), whose sum is σ = 545993728. Its totient is φ = 54432000.

The previous prime is 197578649. The next prime is 197578673. The reversal of 197578668 is 866875791.

197578668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469098 + ... + 469518.

Almost surely, 2^197578668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197578668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272996864).

197578668 is an abundant number, since it is smaller than the sum of its proper divisors (348415060).

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

197578668 is a wasteful number, since it uses less digits than its factorization.

197578668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 621 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The square root of 197578668 is about 14056.2679257333. The cubic root of 197578668 is about 582.4339532280.

The spelling of 197578668 in words is "one hundred ninety-seven million, five hundred seventy-eight thousand, six hundred sixty-eight".