117431640 has 128 divisors (see below), whose sum is σ = 393984000. Its totient is φ = 31112064.

The previous prime is 117431603. The next prime is 117431641. The reversal of 117431640 is 46134711.

It is a happy number.

117431640 is a `hidden beast` number, since 1 + 17 + 4 + 3 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117431641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244921 + ... + 245399.

It is an arithmetic number, because the mean of its divisors is an integer number (3078000).

Almost surely, 2^117431640 is an apocalyptic number.

117431640 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 117431640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196992000).

117431640 is an abundant number, since it is smaller than the sum of its proper divisors (276552360).

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

117431640 is a wasteful number, since it uses less digits than its factorization.

117431640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 117431640 is about 10836.5880239123. The cubic root of 117431640 is about 489.6980508160.

The spelling of 117431640 in words is "one hundred seventeen million, four hundred thirty-one thousand, six hundred forty".