630420 has 96 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 134784.

The previous prime is 630391. The next prime is 630433. The reversal of 630420 is 24036.

630420 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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 630420.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 630420.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7941 + ... + 8019.

It is an arithmetic number, because the mean of its divisors is an integer number (22400).

2⁶³⁰⁴²⁰ is an apocalyptic number.

630420 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 630420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075200).

630420 is an abundant number, since it is smaller than the sum of its proper divisors (1519980).

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

630420 is a wasteful number, since it uses less digits than its factorization.

630420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 630420 is about 793.9899243693. The cubic root of 630420 is about 85.7452348555.

Adding to 630420 its reverse (24036), we get a palindrome (654456).

The spelling of 630420 in words is "six hundred thirty thousand, four hundred twenty".