671340 has 48 divisors (see below), whose sum is σ = 1919232. Its totient is φ = 175296.

The previous prime is 671339. The next prime is 671353. The reversal of 671340 is 43176.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3937 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (39984).

2⁶⁷¹³⁴⁰ is an apocalyptic number.

671340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959616).

671340 is an abundant number, since it is smaller than the sum of its proper divisors (1247892).

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

671340 is a wasteful number, since it uses less digits than its factorization.

671340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 671340 is about 819.3534036056. The cubic root of 671340 is about 87.5616979819.

The spelling of 671340 in words is "six hundred seventy-one thousand, three hundred forty".