117909438 has 8 divisors (see below), whose sum is σ = 235818888. Its totient is φ = 39303144.

The previous prime is 117909437. The next prime is 117909469. The reversal of 117909438 is 834909711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

117909438 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 117909438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117909437) 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, 9825781 + ... + 9825792.

It is an arithmetic number, because the mean of its divisors is an integer number (29477361).

Almost surely, 2^117909438 is an apocalyptic number.

117909438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117909438 is a wasteful number, since it uses less digits than its factorization.

117909438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19651578.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 117909438 is about 10858.6112371702. The cubic root of 117909438 is about 490.3613023184.

The spelling of 117909438 in words is "one hundred seventeen million, nine hundred nine thousand, four hundred thirty-eight".