196689078 has 48 divisors (see below), whose sum is σ = 450290880. Its totient is φ = 61947648.

The previous prime is 196689061. The next prime is 196689139. The reversal of 196689078 is 870986691.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 20526 + ... + 28542.

It is an arithmetic number, because the mean of its divisors is an integer number (9381060).

Almost surely, 2^196689078 is an apocalyptic number.

196689078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 196689078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225145440).

196689078 is an abundant number, since it is smaller than the sum of its proper divisors (253601802).

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

196689078 is a wasteful number, since it uses less digits than its factorization.

196689078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8101 (or 8098 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 196689078 is about 14024.5883362044. The cubic root of 196689078 is about 581.5585095501.

The spelling of 196689078 in words is "one hundred ninety-six million, six hundred eighty-nine thousand, seventy-eight".