671704 has 32 divisors (see below), whose sum is σ = 1458000. Its totient is φ = 286720.

The previous prime is 671701. The next prime is 671717. The reversal of 671704 is 407176.

It is an Ulam number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272 + ... + 1720.

2⁶⁷¹⁷⁰⁴ 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 671704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729000).

671704 is an abundant number, since it is smaller than the sum of its proper divisors (786296).

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

671704 is a wasteful number, since it uses less digits than its factorization.

671704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 671704 is about 819.5754998778. The cubic root of 671704 is about 87.5775204163.

It can be divided in two parts, 67 and 1704, that added together give a palindrome (1771).

The spelling of 671704 in words is "six hundred seventy-one thousand, seven hundred four".