197889320 has 32 divisors (see below), whose sum is σ = 457288200. Its totient is φ = 77015808.

The previous prime is 197889287. The next prime is 197889323. The reversal of 197889320 is 23988791.

197889320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 196056004 + 1833316 = 14002^2 + 1354^2 .

It is not an unprimeable number, because it can be changed into a prime (197889323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65375 + ... + 68334.

Almost surely, 2^197889320 is an apocalyptic number.

197889320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197889320 is an abundant number, since it is smaller than the sum of its proper divisors (259398880).

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

197889320 is a wasteful number, since it uses less digits than its factorization.

197889320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133757 (or 133753 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 197889320 is about 14067.3138871641. The cubic root of 197889320 is about 582.7390460966.

The spelling of 197889320 in words is "one hundred ninety-seven million, eight hundred eighty-nine thousand, three hundred twenty".