117811408 has 120 divisors (see below), whose sum is σ = 280759808. Its totient is φ = 47520000.

The previous prime is 117811403. The next prime is 117811417. The reversal of 117811408 is 804118711.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 117811408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117811403) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 780133 + ... + 780283.

Almost surely, 2^117811408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117811408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140379904).

117811408 is an abundant number, since it is smaller than the sum of its proper divisors (162948400).

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

117811408 is a wasteful number, since it uses less digits than its factorization.

117811408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 31.

The square root of 117811408 is about 10854.0963695740. The cubic root of 117811408 is about 490.2253690483.

The spelling of 117811408 in words is "one hundred seventeen million, eight hundred eleven thousand, four hundred eight".