197812836 has 72 divisors (see below), whose sum is σ = 541929024. Its totient is φ = 60477120.

The previous prime is 197812831. The next prime is 197812837. The reversal of 197812836 is 638218791.

It is a super-3 number, since 3×197812836³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197812791 and 197812800.

It is not an unprimeable number, because it can be changed into a prime (197812831) 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 23 ways as a sum of consecutive naturals, for example, 76891 + ... + 79421.

It is an arithmetic number, because the mean of its divisors is an integer number (7526792).

Almost surely, 2^197812836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197812836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270964512).

197812836 is an abundant number, since it is smaller than the sum of its proper divisors (344116188).

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

197812836 is a wasteful number, since it uses less digits than its factorization.

197812836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2716 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 197812836 is about 14064.5951239273. The cubic root of 197812836 is about 582.6639604266.

The spelling of 197812836 in words is "one hundred ninety-seven million, eight hundred twelve thousand, eight hundred thirty-six".