630709056 has 168 divisors, whose sum is σ = 1872630240. Its totient is φ = 202853376.

The previous prime is 630709007. The next prime is 630709087. The reversal of 630709056 is 650907036.

It is a happy number.

630709056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×630709056² = 795587826640822272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 630709056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2276790 + ... + 2277066.

Almost surely, 2^630709056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630709056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936315120).

630709056 is an abundant number, since it is smaller than the sum of its proper divisors (1241921184).

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

630709056 is a wasteful number, since it uses less digits than its factorization.

630709056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 630709056 is about 25113.9215575744. The cubic root of 630709056 is about 857.5833796530.

The spelling of 630709056 in words is "six hundred thirty million, seven hundred nine thousand, fifty-six".