327991680 has 448 divisors, whose sum is σ = 1270940400. Its totient is φ = 80621568.

The previous prime is 327991673. The next prime is 327991691. The reversal of 327991680 is 86199723.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8864622 + ... + 8864658.

Almost surely, 2^327991680 is an apocalyptic number.

327991680 is a gapful number since it is divisible by the number (30) 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 327991680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635470200).

327991680 is an abundant number, since it is smaller than the sum of its proper divisors (942948720).

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

327991680 is an equidigital number, since it uses as much as digits as its factorization.

327991680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 327991680 is about 18110.5405772440. The cubic root of 327991680 is about 689.6376168956.

The spelling of 327991680 in words is "three hundred twenty-seven million, nine hundred ninety-one thousand, six hundred eighty".