117827640 has 96 divisors (see below), whose sum is σ = 437654880. Its totient is φ = 26931456.

The previous prime is 117827587. The next prime is 117827641. The reversal of 117827640 is 46728711.

117827640 is a `hidden beast` number, since 1 + 1 + 7 + 8 + 2 + 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 = 117827595 and 117827604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117827641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20859 + ... + 25898.

It is an arithmetic number, because the mean of its divisors is an integer number (4558905).

Almost surely, 2^117827640 is an apocalyptic number.

117827640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117827640 is an abundant number, since it is smaller than the sum of its proper divisors (319827240).

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

117827640 is a wasteful number, since it uses less digits than its factorization.

117827640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46781 (or 46774 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 117827640 is about 10854.8440799488. The cubic root of 117827640 is about 490.2478823541.

The spelling of 117827640 in words is "one hundred seventeen million, eight hundred twenty-seven thousand, six hundred forty".