196391680 has 72 divisors (see below), whose sum is σ = 477265824. Its totient is φ = 77414400.

The previous prime is 196391669. The next prime is 196391711. The reversal of 196391680 is 86193691.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89800 + ... + 91960.

It is an arithmetic number, because the mean of its divisors is an integer number (6628692).

Almost surely, 2^196391680 is an apocalyptic number.

196391680 is a gapful number since it is divisible by the number (10) 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 196391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238632912).

196391680 is an abundant number, since it is smaller than the sum of its proper divisors (280874144).

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

196391680 is an equidigital number, since it uses as much as digits as its factorization.

196391680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2239 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 196391680 is about 14013.9815898266. The cubic root of 196391680 is about 581.2652521531.

It can be divided in two parts, 196 and 391680, that added together give a square (391876 = 626²).

The spelling of 196391680 in words is "one hundred ninety-six million, three hundred ninety-one thousand, six hundred eighty".