630661188 has 24 divisors (see below), whose sum is σ = 1495668160. Its totient is φ = 206773920.

The previous prime is 630661159. The next prime is 630661211. The reversal of 630661188 is 881166036.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430048 + ... + 431511.

Almost surely, 2^630661188 is an apocalyptic number.

It is an amenable number.

630661188 is an abundant number, since it is smaller than the sum of its proper divisors (865006972).

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

630661188 is a wasteful number, since it uses less digits than its factorization.

630661188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861627 (or 861625 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 630661188 is about 25112.9685222596. The cubic root of 630661188 is about 857.5616835216.

The spelling of 630661188 in words is "six hundred thirty million, six hundred sixty-one thousand, one hundred eighty-eight".