197821360 has 40 divisors (see below), whose sum is σ = 501749136. Its totient is φ = 71934720.

The previous prime is 197821357. The next prime is 197821361. The reversal of 197821360 is 63128791.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (197821361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111519 + ... + 113278.

Almost surely, 2^197821360 is an apocalyptic number.

197821360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197821360 is an abundant number, since it is smaller than the sum of its proper divisors (303927776).

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

197821360 is a wasteful number, since it uses less digits than its factorization.

197821360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224821 (or 224815 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 197821360 is about 14064.8981510710. The cubic root of 197821360 is about 582.6723295435.

The spelling of 197821360 in words is "one hundred ninety-seven million, eight hundred twenty-one thousand, three hundred sixty".