630971856 has 60 divisors (see below), whose sum is σ = 1831257792. Its totient is φ = 210322656.

The previous prime is 630971827. The next prime is 630971863. The reversal of 630971856 is 658179036.

It is a happy number.

630971856 is a `hidden beast` number, since 630 + 9 + 7 + 1 + 8 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77256 + ... + 85031.

Almost surely, 2^630971856 is an apocalyptic number.

It is an amenable number.

630971856 is an abundant number, since it is smaller than the sum of its proper divisors (1200285936).

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

630971856 is a wasteful number, since it uses less digits than its factorization.

630971856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162310 (or 162292 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 630971856 is about 25119.1531704395. The cubic root of 630971856 is about 857.7024739829.

The spelling of 630971856 in words is "six hundred thirty million, nine hundred seventy-one thousand, eight hundred fifty-six".