670844 has 6 divisors (see below), whose sum is σ = 1173984. Its totient is φ = 335420.

The previous prime is 670823. The next prime is 670849. The reversal of 670844 is 448076.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670844.

It is not an unprimeable number, because it can be changed into a prime (670849) 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 as a sum of consecutive naturals, namely, 83852 + ... + 83859.

It is an arithmetic number, because the mean of its divisors is an integer number (195664).

2⁶⁷⁰⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

670844 is a deficient number, since it is larger than the sum of its proper divisors (503140).

670844 is a wasteful number, since it uses less digits than its factorization.

670844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167715 (or 167713 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 670844 is about 819.0506699832. The cubic root of 670844 is about 87.5401285325.

The spelling of 670844 in words is "six hundred seventy thousand, eight hundred forty-four".