197278146 has 32 divisors (see below), whose sum is σ = 472120320. Its totient is φ = 60700752.

The previous prime is 197278139. The next prime is 197278157. The reversal of 197278146 is 641872791.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 139810 + ... + 141213.

It is an arithmetic number, because the mean of its divisors is an integer number (14753760).

Almost surely, 2^197278146 is an apocalyptic number.

197278146 is an abundant number, since it is smaller than the sum of its proper divisors (274842174).

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

197278146 is a wasteful number, since it uses less digits than its factorization.

197278146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281047 (or 281041 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 197278146 is about 14045.5738935794. The cubic root of 197278146 is about 582.1385046064.

The spelling of 197278146 in words is "one hundred ninety-seven million, two hundred seventy-eight thousand, one hundred forty-six".