196591806 has 16 divisors (see below), whose sum is σ = 436870800. Its totient is φ = 65530584.

The previous prime is 196591799. The next prime is 196591807. The reversal of 196591806 is 608195691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196591807) by changing a digit.

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, 1820241 + ... + 1820348.

It is an arithmetic number, because the mean of its divisors is an integer number (27304425).

Almost surely, 2^196591806 is an apocalyptic number.

196591806 is an abundant number, since it is smaller than the sum of its proper divisors (240278994).

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

196591806 is a wasteful number, since it uses less digits than its factorization.

196591806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640600 (or 3640594 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 196591806 is about 14021.1199980601. The cubic root of 196591806 is about 581.4626243966.

The spelling of 196591806 in words is "one hundred ninety-six million, five hundred ninety-one thousand, eight hundred six".