630820 has 12 divisors (see below), whose sum is σ = 1324764. Its totient is φ = 252320.

The previous prime is 630803. The next prime is 630823. The reversal of 630820 is 28036.

It can be written as a sum of positive squares in 2 ways, for example, as 77284 + 553536 = 278^2 + 744^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15751 + ... + 15790.

It is an arithmetic number, because the mean of its divisors is an integer number (110397).

2⁶³⁰⁸²⁰ is an apocalyptic number.

It is an amenable number.

630820 is an abundant number, since it is smaller than the sum of its proper divisors (693944).

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

630820 is a wasteful number, since it uses less digits than its factorization.

630820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31550 (or 31548 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 630820 is about 794.2417767909. The cubic root of 630820 is about 85.7633660709.

Adding to 630820 its reverse (28036), we get a palindrome (658856).

It can be divided in two parts, 6308 and 20, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 630820 in words is "six hundred thirty thousand, eight hundred twenty".