196638085 has 16 divisors (see below), whose sum is σ = 270070272. Its totient is φ = 134640000.

The previous prime is 196638061. The next prime is 196638103. The reversal of 196638085 is 580836691.

It is a de Polignac number, because none of the positive numbers 2^k-196638085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22545 + ... + 30025.

It is an arithmetic number, because the mean of its divisors is an integer number (16879392).

Almost surely, 2^196638085 is an apocalyptic number.

It is an amenable number.

196638085 is a deficient number, since it is larger than the sum of its proper divisors (73432187).

196638085 is an equidigital number, since it uses as much as digits as its factorization.

196638085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 196638085 is about 14022.7702327322. The cubic root of 196638085 is about 581.5082475214.

The spelling of 196638085 in words is "one hundred ninety-six million, six hundred thirty-eight thousand, eighty-five".