196646688 has 144 divisors (see below), whose sum is σ = 667046016. Its totient is φ = 53729280.

The previous prime is 196646687. The next prime is 196646689. The reversal of 196646688 is 886646691.

It is an interprime number because it is at equal distance from previous prime (196646687) and next prime (196646689).

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (196646683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44248 + ... + 48488.

It is an arithmetic number, because the mean of its divisors is an integer number (4632264).

Almost surely, 2^196646688 is an apocalyptic number.

196646688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196646688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333523008).

196646688 is an abundant number, since it is smaller than the sum of its proper divisors (470399328).

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

196646688 is a wasteful number, since it uses less digits than its factorization.

196646688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287 (or 4276 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 196646688 is about 14023.0769804633. The cubic root of 196646688 is about 581.5167278089.

The spelling of 196646688 in words is "one hundred ninety-six million, six hundred forty-six thousand, six hundred eighty-eight".