630828 has 72 divisors (see below), whose sum is σ = 1834560. Its totient is φ = 187920.

The previous prime is 630827. The next prime is 630841. The reversal of 630828 is 828036.

630828 is a `hidden beast` number, since 630 + 8 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

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 23 ways as a sum of consecutive naturals, for example, 10663 + ... + 10721.

It is an arithmetic number, because the mean of its divisors is an integer number (25480).

2⁶³⁰⁸²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917280).

630828 is an abundant number, since it is smaller than the sum of its proper divisors (1203732).

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

630828 is a wasteful number, since it uses less digits than its factorization.

630828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 630828 is about 794.2468130248. The cubic root of 630828 is about 85.7637286170.

It can be divided in two parts, 6308 and 28, that added together give a palindrome (6336).

The spelling of 630828 in words is "six hundred thirty thousand, eight hundred twenty-eight".