197731008 has 84 divisors (see below), whose sum is σ = 572764920. Its totient is φ = 65212416.

The previous prime is 197730979. The next prime is 197731013. The reversal of 197731008 is 800137791.

197731008 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54103 + ... + 57641.

It is an arithmetic number, because the mean of its divisors is an integer number (6818630).

Almost surely, 2^197731008 is an apocalyptic number.

197731008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197731008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286382460).

197731008 is an abundant number, since it is smaller than the sum of its proper divisors (375033912).

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

197731008 is a wasteful number, since it uses less digits than its factorization.

197731008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 197731008 is about 14061.6858164304. The cubic root of 197731008 is about 582.5836070258.

Adding to 197731008 its reverse (800137791), we get a palindrome (997868799).

The spelling of 197731008 in words is "one hundred ninety-seven million, seven hundred thirty-one thousand, eight".