630720 has 112 divisors (see below), whose sum is σ = 2255520. Its totient is φ = 165888.

The previous prime is 630719. The next prime is 630733. The reversal of 630720 is 27036.

630720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 630693 and 630702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8604 + ... + 8676.

2⁶³⁰⁷²⁰ is an apocalyptic number.

630720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1127760).

630720 is an abundant number, since it is smaller than the sum of its proper divisors (1624800).

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

630720 is a wasteful number, since it uses less digits than its factorization.

630720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 630720 is about 794.1788211732. The cubic root of 630720 is about 85.7588339858.

Adding to 630720 its reverse (27036), we get a palindrome (657756).

The spelling of 630720 in words is "six hundred thirty thousand, seven hundred twenty".