671608 has 32 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 281952.

The previous prime is 671603. The next prime is 671609. The reversal of 671608 is 806176.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 (671603) by changing a digit.

671608 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 7 ways as a sum of consecutive naturals, for example, 3663 + ... + 3841.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2⁶⁷¹⁶⁰⁸ 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 671608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734400).

671608 is an abundant number, since it is smaller than the sum of its proper divisors (797192).

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

671608 is a wasteful number, since it uses less digits than its factorization.

671608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 671608 is about 819.5169308806. The cubic root of 671608 is about 87.5733480217.

The spelling of 671608 in words is "six hundred seventy-one thousand, six hundred eight".