630605720 has 64 divisors (see below), whose sum is σ = 1528381440. Its totient is φ = 233481600.

The previous prime is 630605719. The next prime is 630605737. The reversal of 630605720 is 27506036.

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, 17465 + ... + 39575.

It is an arithmetic number, because the mean of its divisors is an integer number (23880960).

Almost surely, 2^630605720 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 630605720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764190720).

630605720 is an abundant number, since it is smaller than the sum of its proper divisors (897775720).

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

630605720 is a wasteful number, since it uses less digits than its factorization.

630605720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22176 (or 22172 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 630605720 is about 25111.8641283358. The cubic root of 630605720 is about 857.5365413232.

The spelling of 630605720 in words is "six hundred thirty million, six hundred five thousand, seven hundred twenty".