197812838 has 12 divisors (see below), whose sum is σ = 313159140. Its totient is φ = 93700476.

The previous prime is 197812837. The next prime is 197812859. The reversal of 197812838 is 838218791.

197812838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×197812838² = 78259837755228488, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 197812792 and 197812801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197812831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136268 + ... + 137711.

It is an arithmetic number, because the mean of its divisors is an integer number (26096595).

Almost surely, 2^197812838 is an apocalyptic number.

197812838 is a deficient number, since it is larger than the sum of its proper divisors (115346302).

197812838 is a wasteful number, since it uses less digits than its factorization.

197812838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274019 (or 274000 counting only the distinct ones).

The product of its digits is 193536, while the sum is 47.

The square root of 197812838 is about 14064.5951950278. The cubic root of 197812838 is about 582.6639623903.

The spelling of 197812838 in words is "one hundred ninety-seven million, eight hundred twelve thousand, eight hundred thirty-eight".