630402760 has 64 divisors (see below), whose sum is σ = 1538838000. Its totient is φ = 231038976.

The previous prime is 630402749. The next prime is 630402761. The reversal of 630402760 is 67204036.

It can be written as a sum of positive squares in 8 ways, for example, as 23174596 + 607228164 = 4814^2 + 24642^2 .

It is not an unprimeable number, because it can be changed into a prime (630402761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66816 + ... + 75664.

Almost surely, 2^630402760 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 630402760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769419000).

630402760 is an abundant number, since it is smaller than the sum of its proper divisors (908435240).

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

630402760 is a wasteful number, since it uses less digits than its factorization.

630402760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010 (or 9006 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 630402760 is about 25107.8226853704. The cubic root of 630402760 is about 857.4445322773. Note that the first 3 decimals are identical.

Adding to 630402760 its reverse (67204036), we get a palindrome (697606796).

The spelling of 630402760 in words is "six hundred thirty million, four hundred two thousand, seven hundred sixty".