117538438 has 4 divisors (see below), whose sum is σ = 176307660. Its totient is φ = 58769218.

The previous prime is 117538423. The next prime is 117538439. The reversal of 117538438 is 834835711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834835711 = 17 ⋅49107983.

It is a self number, because there is not a number n which added to its sum of digits gives 117538438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117538439) 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 as a sum of consecutive naturals, namely, 29384608 + ... + 29384611.

It is an arithmetic number, because the mean of its divisors is an integer number (44076915).

Almost surely, 2^117538438 is an apocalyptic number.

117538438 is a deficient number, since it is larger than the sum of its proper divisors (58769222).

117538438 is an equidigital number, since it uses as much as digits as its factorization.

117538438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58769221.

The product of its digits is 80640, while the sum is 40.

The square root of 117538438 is about 10841.5145620896. The cubic root of 117538438 is about 489.8464575148.

The spelling of 117538438 in words is "one hundred seventeen million, five hundred thirty-eight thousand, four hundred thirty-eight".