638330103 has 12 divisors (see below), whose sum is σ = 922332840. Its totient is φ = 425414736.

The previous prime is 638330101. The next prime is 638330113. The reversal of 638330103 is 301033836.

It is not a de Polignac number, because 638330103 - 2¹ = 638330101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638330101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23053 + ... + 42521.

It is an arithmetic number, because the mean of its divisors is an integer number (76861070).

Almost surely, 2^638330103 is an apocalyptic number.

638330103 is a deficient number, since it is larger than the sum of its proper divisors (284002737).

638330103 is a wasteful number, since it uses less digits than its factorization.

638330103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23118 (or 23115 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 638330103 is about 25265.1954870727. The cubic root of 638330103 is about 861.0237056770.

Adding to 638330103 its reverse (301033836), we get a palindrome (939363939).

The spelling of 638330103 in words is "six hundred thirty-eight million, three hundred thirty thousand, one hundred three".