630520 has 32 divisors (see below), whose sum is σ = 1548720. Its totient is φ = 229120.

The previous prime is 630493. The next prime is 630521. The reversal of 630520 is 25036.

It is a junction number, because it is equal to n+sod(n) for n = 630494 and 630503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630521) by changing a digit.

630520 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 7 ways as a sum of consecutive naturals, for example, 277 + ... + 1156.

2⁶³⁰⁵²⁰ is an apocalyptic number.

It is an amenable number.

630520 is an abundant number, since it is smaller than the sum of its proper divisors (918200).

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

630520 is a wasteful number, since it uses less digits than its factorization.

630520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 630520 is about 794.0528949636. The cubic root of 630520 is about 85.7497683782.

Adding to 630520 its reverse (25036), we get a palindrome (655556).

The spelling of 630520 in words is "six hundred thirty thousand, five hundred twenty".