196390385 has 8 divisors (see below), whose sum is σ = 235775976. Its totient is φ = 157040640.

The previous prime is 196390373. The next prime is 196390421. The reversal of 196390385 is 583093691.

It can be written as a sum of positive squares in 4 ways, for example, as 33547264 + 162843121 = 5792^2 + 12761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-196390385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105 + ... + 20465.

It is an arithmetic number, because the mean of its divisors is an integer number (29471997).

Almost surely, 2^196390385 is an apocalyptic number.

It is an amenable number.

196390385 is a deficient number, since it is larger than the sum of its proper divisors (39385591).

196390385 is a wasteful number, since it uses less digits than its factorization.

196390385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17923.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 196390385 is about 14013.9353858936. The cubic root of 196390385 is about 581.2639745359.

The spelling of 196390385 in words is "one hundred ninety-six million, three hundred ninety thousand, three hundred eighty-five".