630668144 has 20 divisors (see below), whose sum is σ = 1223951424. Its totient is φ = 314809728.

The previous prime is 630668141. The next prime is 630668149. The reversal of 630668144 is 441866036.

It is a junction number, because it is equal to n+sod(n) for n = 630668098 and 630668107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630668141) 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, 22757 + ... + 42180.

Almost surely, 2^630668144 is an apocalyptic number.

It is an amenable number.

630668144 is a deficient number, since it is larger than the sum of its proper divisors (593283280).

630668144 is a wasteful number, since it uses less digits than its factorization.

630668144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65552 (or 65546 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 630668144 is about 25113.1070160584. The cubic root of 630668144 is about 857.5648363910.

The spelling of 630668144 in words is "six hundred thirty million, six hundred sixty-eight thousand, one hundred forty-four".