197688450 has 48 divisors (see below), whose sum is σ = 511592256. Its totient is φ = 50424000.

The previous prime is 197688443. The next prime is 197688497. The reversal of 197688450 is 54886791.

It is a self number, because there is not a number n which added to its sum of digits gives 197688450.

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 23 ways as a sum of consecutive naturals, for example, 25201 + ... + 32100.

It is an arithmetic number, because the mean of its divisors is an integer number (10658172).

Almost surely, 2^197688450 is an apocalyptic number.

197688450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197688450 is an abundant number, since it is smaller than the sum of its proper divisors (313903806).

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

197688450 is a wasteful number, since it uses less digits than its factorization.

197688450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57339 (or 57334 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 197688450 is about 14060.1724740488. The cubic root of 197688450 is about 582.5418071880.

The spelling of 197688450 in words is "one hundred ninety-seven million, six hundred eighty-eight thousand, four hundred fifty".