117864438 has 16 divisors (see below), whose sum is σ = 240744960. Its totient is φ = 38452136.

The previous prime is 117864433. The next prime is 117864479. The reversal of 117864438 is 834468711.

It is a self number, because there is not a number n which added to its sum of digits gives 117864438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117864431) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 208698 + ... + 209261.

It is an arithmetic number, because the mean of its divisors is an integer number (15046560).

Almost surely, 2^117864438 is an apocalyptic number.

117864438 is an abundant number, since it is smaller than the sum of its proper divisors (122880522).

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

117864438 is a wasteful number, since it uses less digits than its factorization.

117864438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418011.

The product of its digits is 129024, while the sum is 42.

The square root of 117864438 is about 10856.5389512496. The cubic root of 117864438 is about 490.2989124403.

The spelling of 117864438 in words is "one hundred seventeen million, eight hundred sixty-four thousand, four hundred thirty-eight".