638413101 has 24 divisors (see below), whose sum is σ = 953272320. Its totient is φ = 411285600.

The previous prime is 638413073. The next prime is 638413103. The reversal of 638413101 is 101314836.

638413101 is a `hidden beast` number, since 638 + 4 + 13 + 10 + 1 = 666.

It is not a de Polignac number, because 638413101 - 2¹³ = 638404909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638413103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275335 + ... + 277643.

It is an arithmetic number, because the mean of its divisors is an integer number (39719680).

Almost surely, 2^638413101 is an apocalyptic number.

It is an amenable number.

638413101 is a deficient number, since it is larger than the sum of its proper divisors (314859219).

638413101 is a wasteful number, since it uses less digits than its factorization.

638413101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3334 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 638413101 is about 25266.8379699558. The cubic root of 638413101 is about 861.0610218702.

Adding to 638413101 its reverse (101314836), we get a palindrome (739727937).

The spelling of 638413101 in words is "six hundred thirty-eight million, four hundred thirteen thousand, one hundred one".