630641250 has 120 divisors (see below), whose sum is σ = 1767231180. Its totient is φ = 162288000.

The previous prime is 630641237. The next prime is 630641251. The reversal of 630641250 is 52146036.

630641250 is a `hidden beast` number, since 630 + 6 + 4 + 1 + 25 + 0 = 666.

It can be written as a sum of positive squares in 10 ways, for example, as 20007729 + 610633521 = 4473^2 + 24711^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630641251) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 325284 + ... + 327216.

Almost surely, 2^630641250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630641250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883615590).

630641250 is an abundant number, since it is smaller than the sum of its proper divisors (1136589930).

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

630641250 is a wasteful number, since it uses less digits than its factorization.

630641250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 630641250 is about 25112.5715529095. The cubic root of 630641250 is about 857.5526463157.

Adding to 630641250 its reverse (52146036), we get a palindrome (682787286).

The spelling of 630641250 in words is "six hundred thirty million, six hundred forty-one thousand, two hundred fifty".