638002102 has 8 divisors (see below), whose sum is σ = 1007371800. Its totient is φ = 302211504.

The previous prime is 638002097. The next prime is 638002109. The reversal of 638002102 is 201200836.

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 (638002109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8394727 + ... + 8394802.

It is an arithmetic number, because the mean of its divisors is an integer number (125921475).

Almost surely, 2^638002102 is an apocalyptic number.

638002102 is a deficient number, since it is larger than the sum of its proper divisors (369369698).

638002102 is a wasteful number, since it uses less digits than its factorization.

638002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16789550.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 638002102 is about 25258.7034900844. The cubic root of 638002102 is about 860.8762036131.

Adding to 638002102 its reverse (201200836), we get a palindrome (839202938).

The spelling of 638002102 in words is "six hundred thirty-eight million, two thousand, one hundred two".