671740 has 12 divisors (see below), whose sum is σ = 1410696. Its totient is φ = 268688.

The previous prime is 671729. The next prime is 671743. The reversal of 671740 is 47176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16774 + ... + 16813.

It is an arithmetic number, because the mean of its divisors is an integer number (117558).

2⁶⁷¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

671740 is an abundant number, since it is smaller than the sum of its proper divisors (738956).

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

671740 is a wasteful number, since it uses less digits than its factorization.

671740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33596 (or 33594 counting only the distinct ones).

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

The square root of 671740 is about 819.5974621727. The cubic root of 671740 is about 87.5790849618.

The spelling of 671740 in words is "six hundred seventy-one thousand, seven hundred forty".