117647640 has 160 divisors (see below), whose sum is σ = 431505360. Its totient is φ = 28512000.

The previous prime is 117647617. The next prime is 117647653. The reversal of 117647640 is 46746711.

117647640 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 4 + 7 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 117647595 and 117647604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33990 + ... + 37290.

Almost surely, 2^117647640 is an apocalyptic number.

117647640 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 117647640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215752680).

117647640 is an abundant number, since it is smaller than the sum of its proper divisors (313857720).

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

117647640 is a wasteful number, since it uses less digits than its factorization.

117647640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3322 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 117647640 is about 10846.5496818113. The cubic root of 117647640 is about 489.9981118905.

The spelling of 117647640 in words is "one hundred seventeen million, six hundred forty-seven thousand, six hundred forty".