630812 has 24 divisors (see below), whose sum is σ = 1359456. Its totient is φ = 249408.

The previous prime is 630803. The next prime is 630823. The reversal of 630812 is 218036.

It is a congruent number.

It is an unprimeable number.

630812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503 + ... + 1230.

It is an arithmetic number, because the mean of its divisors is an integer number (56644).

2⁶³⁰⁸¹² is an apocalyptic number.

It is an amenable number.

630812 is an abundant number, since it is smaller than the sum of its proper divisors (728644).

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

630812 is a wasteful number, since it uses less digits than its factorization.

630812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 630812 is about 794.2367405251. The cubic root of 630812 is about 85.7630035217.

Adding to 630812 its reverse (218036), we get a palindrome (848848).

The spelling of 630812 in words is "six hundred thirty thousand, eight hundred twelve".