671188 has 12 divisors (see below), whose sum is σ = 1342432. Its totient is φ = 287640.

The previous prime is 671161. The next prime is 671189. The reversal of 671188 is 881176.

671188 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11958 + ... + 12013.

2⁶⁷¹¹⁸⁸ is an apocalyptic number.

It is an amenable number.

671188 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

671188 is a wasteful number, since it uses less digits than its factorization.

671188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23982 (or 23980 counting only the distinct ones).

The product of its digits is 2688, while the sum is 31.

The square root of 671188 is about 819.2606422867. The cubic root of 671188 is about 87.5550891187. Note that the first 3 decimals are identical.

The spelling of 671188 in words is "six hundred seventy-one thousand, one hundred eighty-eight".