630646 has 8 divisors (see below), whose sum is σ = 966240. Its totient is φ = 308568.

The previous prime is 630613. The next prime is 630659. The reversal of 630646 is 646036.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 630646.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3261 + ... + 3448.

It is an arithmetic number, because the mean of its divisors is an integer number (120780).

2⁶³⁰⁶⁴⁶ is an apocalyptic number.

630646 is a deficient number, since it is larger than the sum of its proper divisors (335594).

630646 is a wasteful number, since it uses less digits than its factorization.

630646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 630646 is about 794.1322308029. The cubic root of 630646 is about 85.7554799344.

The spelling of 630646 in words is "six hundred thirty thousand, six hundred forty-six".