630689320 has 16 divisors (see below), whose sum is σ = 1419051060. Its totient is φ = 252275712.

The previous prime is 630689317. The next prime is 630689321. The reversal of 630689320 is 23986036.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 511573924 + 119115396 = 22618^2 + 10914^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 630689320.

It is not an unprimeable number, because it can be changed into a prime (630689321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7883577 + ... + 7883656.

Almost surely, 2^630689320 is an apocalyptic number.

It is an amenable number.

630689320 is an abundant number, since it is smaller than the sum of its proper divisors (788361740).

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

630689320 is a wasteful number, since it uses less digits than its factorization.

630689320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15767244 (or 15767240 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 630689320 is about 25113.5286250260. The cubic root of 630689320 is about 857.5744344603.

The spelling of 630689320 in words is "six hundred thirty million, six hundred eighty-nine thousand, three hundred twenty".