197434146 has 128 divisors (see below), whose sum is σ = 517870080. Its totient is φ = 48771072.

The previous prime is 197434123. The next prime is 197434151. The reversal of 197434146 is 641434791.

It is a Harshad number since it is a multiple of its sum of digits (39).

197434146 is a modest number, since divided by 34146 gives 1974 as remainder.

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 63 ways as a sum of consecutive naturals, for example, 585690 + ... + 586026.

It is an arithmetic number, because the mean of its divisors is an integer number (4045860).

Almost surely, 2^197434146 is an apocalyptic number.

197434146 is the 7511-st nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197434146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258935040).

197434146 is an abundant number, since it is smaller than the sum of its proper divisors (320435934).

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

197434146 is a wasteful number, since it uses less digits than its factorization.

197434146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428.

The product of its digits is 72576, while the sum is 39.

The square root of 197434146 is about 14051.1261470389. The cubic root of 197434146 is about 582.2919084540.

The spelling of 197434146 in words is "one hundred ninety-seven million, four hundred thirty-four thousand, one hundred forty-six".