630917646 has 32 divisors (see below), whose sum is σ = 1328382720. Its totient is φ = 199377024.

The previous prime is 630917587. The next prime is 630917647. The reversal of 630917646 is 646719036.

It is a junction number, because it is equal to n+sod(n) for n = 630917598 and 630917607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630917647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4636 + ... + 35823.

It is an arithmetic number, because the mean of its divisors is an integer number (41511960).

Almost surely, 2^630917646 is an apocalyptic number.

630917646 is an abundant number, since it is smaller than the sum of its proper divisors (697465074).

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

630917646 is a wasteful number, since it uses less digits than its factorization.

630917646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40600.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 630917646 is about 25118.0740901845. The cubic root of 630917646 is about 857.6779100860.

The spelling of 630917646 in words is "six hundred thirty million, nine hundred seventeen thousand, six hundred forty-six".