671860 has 24 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 230304.

The previous prime is 671851. The next prime is 671887. The reversal of 671860 is 68176.

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

It is an Ulam number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2260 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (67200).

2⁶⁷¹⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

671860 is an abundant number, since it is smaller than the sum of its proper divisors (940940).

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

671860 is a wasteful number, since it uses less digits than its factorization.

671860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815 (or 4813 counting only the distinct ones).

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

The square root of 671860 is about 819.6706655725. The cubic root of 671860 is about 87.5842997098.

The spelling of 671860 in words is "six hundred seventy-one thousand, eight hundred sixty".