670648 has 16 divisors (see below), whose sum is σ = 1371960. Its totient is φ = 304800.

The previous prime is 670639. The next prime is 670669. The reversal of 670648 is 846076.

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 670648.

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 3 ways as a sum of consecutive naturals, for example, 3723 + ... + 3898.

2⁶⁷⁰⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

670648 is an abundant number, since it is smaller than the sum of its proper divisors (701312).

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

670648 is a wasteful number, since it uses less digits than its factorization.

670648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638 (or 7634 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 670648 is about 818.9310105253. The cubic root of 670648 is about 87.5316021904.

The spelling of 670648 in words is "six hundred seventy thousand, six hundred forty-eight".