671730 has 16 divisors (see below), whose sum is σ = 1612224. Its totient is φ = 179120.

The previous prime is 671729. The next prime is 671743. The reversal of 671730 is 37176.

It is a self number, because there is not a number n which added to its sum of digits gives 671730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11166 + ... + 11225.

It is an arithmetic number, because the mean of its divisors is an integer number (100764).

2⁶⁷¹⁷³⁰ is an apocalyptic number.

671730 is an abundant number, since it is smaller than the sum of its proper divisors (940494).

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

671730 is a wasteful number, since it uses less digits than its factorization.

671730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22401.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 671730 is about 819.5913615943. The cubic root of 671730 is about 87.5786503715.

The spelling of 671730 in words is "six hundred seventy-one thousand, seven hundred thirty".