630678 has 16 divisors (see below), whose sum is σ = 1269360. Its totient is φ = 208896.

The previous prime is 630677. The next prime is 630689. The reversal of 630678 is 876036.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (79335).

2⁶³⁰⁶⁷⁸ is an apocalyptic number.

630678 is an abundant number, since it is smaller than the sum of its proper divisors (638682).

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

630678 is a wasteful number, since it uses less digits than its factorization.

630678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 630678 is about 794.1523783255. The cubic root of 630678 is about 85.7569303672.

The spelling of 630678 in words is "six hundred thirty thousand, six hundred seventy-eight".