671328 has 120 divisors (see below), whose sum is σ = 2317392. Its totient is φ = 186624.

The previous prime is 671323. The next prime is 671339. The reversal of 671328 is 823176.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is one of the 548 Lynch-Bell numbers.

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671323) by changing a digit.

671328 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18126 + ... + 18162.

2⁶⁷¹³²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158696).

671328 is an abundant number, since it is smaller than the sum of its proper divisors (1646064).

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

671328 is a wasteful number, since it uses less digits than its factorization.

671328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 49 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 671328 is about 819.3460807254. The cubic root of 671328 is about 87.5611762658.

671328 divided by its product of digits (2016) gives a palindrome (333).

It can be divided in two parts, 671 and 328, that added together give a palindrome (999).

The spelling of 671328 in words is "six hundred seventy-one thousand, three hundred twenty-eight".