630321738 has 16 divisors (see below), whose sum is σ = 1264700736. Its totient is φ = 209431040.

The previous prime is 630321719. The next prime is 630321743. The reversal of 630321738 is 837123036.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 630321699 and 630321708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167031 + ... + 170762.

It is an arithmetic number, because the mean of its divisors is an integer number (79043796).

Almost surely, 2^630321738 is an apocalyptic number.

630321738 is an abundant number, since it is smaller than the sum of its proper divisors (634378998).

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

630321738 is a wasteful number, since it uses less digits than its factorization.

630321738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338109.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 630321738 is about 25106.2091523193. The cubic root of 630321738 is about 857.4077965840.

The spelling of 630321738 in words is "six hundred thirty million, three hundred twenty-one thousand, seven hundred thirty-eight".