630798 has 32 divisors (see below), whose sum is σ = 1506816. Its totient is φ = 172128.

The previous prime is 630797. The next prime is 630803. The reversal of 630798 is 897036.

It is a happy number.

It is a super-2 number, since 2×630798² = 795812233608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630797) 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 15 ways as a sum of consecutive naturals, for example, 640 + ... + 1292.

It is an arithmetic number, because the mean of its divisors is an integer number (47088).

2⁶³⁰⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753408).

630798 is an abundant number, since it is smaller than the sum of its proper divisors (876018).

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

630798 is a wasteful number, since it uses less digits than its factorization.

630798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 630798 is about 794.2279269832. The cubic root of 630798 is about 85.7623690533.

The spelling of 630798 in words is "six hundred thirty thousand, seven hundred ninety-eight".