630998056 has 64 divisors (see below), whose sum is σ = 1384588800. Its totient is φ = 266976000.

The previous prime is 630998033. The next prime is 630998059. The reversal of 630998056 is 650899036.

It is a junction number, because it is equal to n+sod(n) for n = 630997997 and 630998015.

It is not an unprimeable number, because it can be changed into a prime (630998059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56106 + ... + 66406.

It is an arithmetic number, because the mean of its divisors is an integer number (21634200).

Almost surely, 2^630998056 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 630998056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692294400).

630998056 is an abundant number, since it is smaller than the sum of its proper divisors (753590744).

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

630998056 is a wasteful number, since it uses less digits than its factorization.

630998056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10370 (or 10366 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 630998056 is about 25119.6746794221. The cubic root of 630998056 is about 857.7143453490.

The spelling of 630998056 in words is "six hundred thirty million, nine hundred ninety-eight thousand, fifty-six".