196783818 has 32 divisors (see below), whose sum is σ = 490682880. Its totient is φ = 51112560.

The previous prime is 196783801. The next prime is 196783889. The reversal of 196783818 is 818387691.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 212508 + ... + 213431.

It is an arithmetic number, because the mean of its divisors is an integer number (15333840).

Almost surely, 2^196783818 is an apocalyptic number.

196783818 is an abundant number, since it is smaller than the sum of its proper divisors (293899062).

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

196783818 is a wasteful number, since it uses less digits than its factorization.

196783818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425962.

The product of its digits is 580608, while the sum is 51.

The square root of 196783818 is about 14027.9655688200. The cubic root of 196783818 is about 581.6518684186.

The spelling of 196783818 in words is "one hundred ninety-six million, seven hundred eighty-three thousand, eight hundred eighteen".