197688830 has 32 divisors (see below), whose sum is σ = 360180000. Its totient is φ = 78118272.

The previous prime is 197688811. The next prime is 197688833. The reversal of 197688830 is 38886791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197688833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395921 + ... + 396419.

It is an arithmetic number, because the mean of its divisors is an integer number (11255625).

Almost surely, 2^197688830 is an apocalyptic number.

197688830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197688830 is a deficient number, since it is larger than the sum of its proper divisors (162491170).

197688830 is a wasteful number, since it uses less digits than its factorization.

197688830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 197688830 is about 14060.1859873901. The cubic root of 197688830 is about 582.5421804449.

The spelling of 197688830 in words is "one hundred ninety-seven million, six hundred eighty-eight thousand, eight hundred thirty".