117638128 has 20 divisors (see below), whose sum is σ = 228587800. Its totient is φ = 58647744.

The previous prime is 117638107. The next prime is 117638161. The reversal of 117638128 is 821836711.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4950 + ... + 16117.

It is an arithmetic number, because the mean of its divisors is an integer number (11429390).

Almost surely, 2^117638128 is an apocalyptic number.

It is an amenable number.

117638128 is a deficient number, since it is larger than the sum of its proper divisors (110949672).

117638128 is a wasteful number, since it uses less digits than its factorization.

117638128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21424 (or 21418 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 117638128 is about 10846.1111924966. Note that the first 4 decimals coincide. The cubic root of 117638128 is about 489.9849058241.

It can be divided in two parts, 11763 and 8128, that added together give a palindrome (19891).

The spelling of 117638128 in words is "one hundred seventeen million, six hundred thirty-eight thousand, one hundred twenty-eight".