196491638 has 16 divisors (see below), whose sum is σ = 338246304. Its totient is φ = 83859840.

The previous prime is 196491629. The next prime is 196491641. The reversal of 196491638 is 836194691.

196491638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 196491592 and 196491601.

It is a congruent 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, 25745 + ... + 32492.

It is an arithmetic number, because the mean of its divisors is an integer number (21140394).

Almost surely, 2^196491638 is an apocalyptic number.

196491638 is a deficient number, since it is larger than the sum of its proper divisors (141754666).

196491638 is a wasteful number, since it uses less digits than its factorization.

196491638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58487.

The product of its digits is 279936, while the sum is 47.

The square root of 196491638 is about 14017.5475030406. The cubic root of 196491638 is about 581.3638514715.

The spelling of 196491638 in words is "one hundred ninety-six million, four hundred ninety-one thousand, six hundred thirty-eight".