630684 has 18 divisors (see below), whose sum is σ = 1594320. Its totient is φ = 210216.

The previous prime is 630677. The next prime is 630689. The reversal of 630684 is 486036.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630689) by changing a digit.

630684 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8724 + ... + 8795.

2⁶³⁰⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

630684 is an abundant number, since it is smaller than the sum of its proper divisors (963636).

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

630684 is a wasteful number, since it uses less digits than its factorization.

630684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529 (or 17524 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 630684 is about 794.1561559290. The cubic root of 630684 is about 85.7572023179.

The spelling of 630684 in words is "six hundred thirty thousand, six hundred eighty-four".