630122720 has 96 divisors (see below), whose sum is σ = 1572867072. Its totient is φ = 238070272.

The previous prime is 630122711. The next prime is 630122813. The reversal of 630122720 is 27221036.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304409 + ... + 306471.

It is an arithmetic number, because the mean of its divisors is an integer number (16384032).

Almost surely, 2^630122720 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 630122720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786433536).

630122720 is an abundant number, since it is smaller than the sum of its proper divisors (942744352).

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

630122720 is a wasteful number, since it uses less digits than its factorization.

630122720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 630122720 is about 25102.2453178994. The cubic root of 630122720 is about 857.3175476751.

Adding to 630122720 its reverse (27221036), we get a palindrome (657343756).

The spelling of 630122720 in words is "six hundred thirty million, one hundred twenty-two thousand, seven hundred twenty".