117785940 has 96 divisors (see below), whose sum is σ = 349345920. Its totient is φ = 29569536.

The previous prime is 117785929. The next prime is 117785951. The reversal of 117785940 is 49587711.

It is an interprime number because it is at equal distance from previous prime (117785929) and next prime (117785951).

It is a junction number, because it is equal to n+sod(n) for n = 117785892 and 117785901.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 315594 + ... + 315966.

It is an arithmetic number, because the mean of its divisors is an integer number (3639020).

Almost surely, 2^117785940 is an apocalyptic number.

117785940 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 117785940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174672960).

117785940 is an abundant number, since it is smaller than the sum of its proper divisors (231559980).

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

117785940 is a wasteful number, since it uses less digits than its factorization.

117785940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 117785940 is about 10852.9231085455. The cubic root of 117785940 is about 490.1900415146.

The spelling of 117785940 in words is "one hundred seventeen million, seven hundred eighty-five thousand, nine hundred forty".