197664450 has 24 divisors (see below), whose sum is σ = 490208208. Its totient is φ = 52710480.

The previous prime is 197664433. The next prime is 197664517. The reversal of 197664450 is 54466791.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 658732 + ... + 659031.

It is an arithmetic number, because the mean of its divisors is an integer number (20425342).

Almost surely, 2^197664450 is an apocalyptic number.

197664450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197664450 is an abundant number, since it is smaller than the sum of its proper divisors (292543758).

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

197664450 is a wasteful number, since it uses less digits than its factorization.

197664450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317778 (or 1317773 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 197664450 is about 14059.3189735492. The cubic root of 197664450 is about 582.5182320977.

The spelling of 197664450 in words is "one hundred ninety-seven million, six hundred sixty-four thousand, four hundred fifty".