638330102 has 8 divisors (see below), whose sum is σ = 957961512. Its totient is φ = 319009600.

The previous prime is 638330101. The next prime is 638330113. The reversal of 638330102 is 201033836.

It is a sphenic number, since it is the product of 3 distinct primes.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72524 + ... + 80847.

It is an arithmetic number, because the mean of its divisors is an integer number (119745189).

Almost surely, 2^638330102 is an apocalyptic number.

638330102 is a deficient number, since it is larger than the sum of its proper divisors (319631410).

638330102 is a wasteful number, since it uses less digits than its factorization.

638330102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155454.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 638330102 is about 25265.1954672827. The cubic root of 638330102 is about 861.0237052273.

Adding to 638330102 its reverse (201033836), we get a palindrome (839363938).

The spelling of 638330102 in words is "six hundred thirty-eight million, three hundred thirty thousand, one hundred two".