197805234 has 128 divisors (see below), whose sum is σ = 485720064. Its totient is φ = 53433600.

The previous prime is 197805233. The next prime is 197805247. The reversal of 197805234 is 432508791.

It is a junction number, because it is equal to n+sod(n) for n = 197805192 and 197805201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197805233) 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 63 ways as a sum of consecutive naturals, for example, 4208599 + ... + 4208645.

It is an arithmetic number, because the mean of its divisors is an integer number (3794688).

Almost surely, 2^197805234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197805234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242860032).

197805234 is an abundant number, since it is smaller than the sum of its proper divisors (287914830).

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

197805234 is a wasteful number, since it uses less digits than its factorization.

197805234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 197805234 is about 14064.3248682615. The cubic root of 197805234 is about 582.6564963539.

The spelling of 197805234 in words is "one hundred ninety-seven million, eight hundred five thousand, two hundred thirty-four".