638300630 has 32 divisors (see below), whose sum is σ = 1319362560. Its totient is φ = 219892320.

The previous prime is 638300617. The next prime is 638300639. The reversal of 638300630 is 36003836.

638300630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 638300593 and 638300602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638300639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150614 + ... + 154793.

It is an arithmetic number, because the mean of its divisors is an integer number (41230080).

Almost surely, 2^638300630 is an apocalyptic number.

638300630 is an abundant number, since it is smaller than the sum of its proper divisors (681061930).

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

638300630 is a wasteful number, since it uses less digits than its factorization.

638300630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305444.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 638300630 is about 25264.6122075919. The cubic root of 638300630 is about 861.0104537340.

The spelling of 638300630 in words is "six hundred thirty-eight million, three hundred thousand, six hundred thirty".