117685620 has 144 divisors (see below), whose sum is σ = 404826240. Its totient is φ = 27433728.

The previous prime is 117685591. The next prime is 117685627. The reversal of 117685620 is 26586711.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117685627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43137 + ... + 45783.

Almost surely, 2^117685620 is an apocalyptic number.

117685620 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 117685620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202413120).

117685620 is an abundant number, since it is smaller than the sum of its proper divisors (287140620).

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

117685620 is a wasteful number, since it uses less digits than its factorization.

117685620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 117685620 is about 10848.3003277011. The cubic root of 117685620 is about 490.0508346538.

The spelling of 117685620 in words is "one hundred seventeen million, six hundred eighty-five thousand, six hundred twenty".