117201638 has 36 divisors (see below), whose sum is σ = 193885236. Its totient is φ = 53121600.

The previous prime is 117201593. The next prime is 117201649. The reversal of 117201638 is 836102711.

It is a self number, because there is not a number n which added to its sum of digits gives 117201638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 555353 + ... + 555563.

It is an arithmetic number, because the mean of its divisors is an integer number (5385701).

Almost surely, 2^117201638 is an apocalyptic number.

117201638 is a deficient number, since it is larger than the sum of its proper divisors (76683598).

117201638 is a wasteful number, since it uses less digits than its factorization.

117201638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 117201638 is about 10825.9705338598. The cubic root of 117201638 is about 489.3781337854.

The spelling of 117201638 in words is "one hundred seventeen million, two hundred one thousand, six hundred thirty-eight".