196216640 has 28 divisors (see below), whose sum is σ = 467241636. Its totient is φ = 78486528.

The previous prime is 196216637. The next prime is 196216649. The reversal of 196216640 is 46612691.

It can be written as a sum of positive squares in 2 ways, for example, as 28047616 + 168169024 = 5296^2 + 12968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 196216640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196216649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306269 + ... + 306908.

Almost surely, 2^196216640 is an apocalyptic number.

196216640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196216640 is an abundant number, since it is smaller than the sum of its proper divisors (271024996).

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

196216640 is an equidigital number, since it uses as much as digits as its factorization.

196216640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613194 (or 613184 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 196216640 is about 14007.7350060600. The cubic root of 196216640 is about 581.0925107681.

The spelling of 196216640 in words is "one hundred ninety-six million, two hundred sixteen thousand, six hundred forty".