117185640 has 128 divisors (see below), whose sum is σ = 413078400. Its totient is φ = 26219520.

The previous prime is 117185609. The next prime is 117185687. The reversal of 117185640 is 46581711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13746 + ... + 20574.

It is an arithmetic number, because the mean of its divisors is an integer number (3227175).

Almost surely, 2^117185640 is an apocalyptic number.

117185640 is a gapful number since it is divisible by the number (10) 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 117185640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206539200).

117185640 is an abundant number, since it is smaller than the sum of its proper divisors (295892760).

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

117185640 is a wasteful number, since it uses less digits than its factorization.

117185640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867 (or 6863 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 117185640 is about 10825.2316372445. The cubic root of 117185640 is about 489.3558660999.

The spelling of 117185640 in words is "one hundred seventeen million, one hundred eighty-five thousand, six hundred forty".