630496640 has 32 divisors (see below), whose sum is σ = 1507282560. Its totient is φ = 252198400.

The previous prime is 630496609. The next prime is 630496651. The reversal of 630496640 is 46694036.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 630496594 and 630496603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491936 + ... + 493215.

It is an arithmetic number, because the mean of its divisors is an integer number (47102580).

Almost surely, 2^630496640 is an apocalyptic number.

It is an amenable number.

630496640 is an abundant number, since it is smaller than the sum of its proper divisors (876785920).

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

630496640 is an equidigital number, since it uses as much as digits as its factorization.

630496640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985170 (or 985158 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 630496640 is about 25109.6921526330. The cubic root of 630496640 is about 857.4870939020.

It can be divided in two parts, 630496 and 640, that added together give a palindrome (631136).

The spelling of 630496640 in words is "six hundred thirty million, four hundred ninety-six thousand, six hundred forty".