117405288 has 320 divisors, whose sum is σ = 443963520. Its totient is φ = 27993600.

The previous prime is 117405251. The next prime is 117405293. The reversal of 117405288 is 882504711.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 648558 + ... + 648738.

It is an arithmetic number, because the mean of its divisors is an integer number (1387386).

Almost surely, 2^117405288 is an apocalyptic number.

117405288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117405288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221981760).

117405288 is an abundant number, since it is smaller than the sum of its proper divisors (326558232).

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

117405288 is a wasteful number, since it uses less digits than its factorization.

117405288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 117405288 is about 10835.3720748297. The cubic root of 117405288 is about 489.6614181889.

Adding to 117405288 its reverse (882504711), we get a palindrome (999909999).

The spelling of 117405288 in words is "one hundred seventeen million, four hundred five thousand, two hundred eighty-eight".