117555840 has 128 divisors (see below), whose sum is σ = 416404800. Its totient is φ = 31343616.

The previous prime is 117555839. The next prime is 117555881. The reversal of 117555840 is 48555711.

117555840 is a `hidden beast` number, since 1 + 1 + 75 + 5 + 584 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 117555795 and 117555804.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13879 + ... + 20681.

Almost surely, 2^117555840 is an apocalyptic number.

117555840 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 117555840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208202400).

117555840 is an abundant number, since it is smaller than the sum of its proper divisors (298848960).

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

117555840 is an equidigital number, since it uses as much as digits as its factorization.

117555840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831 (or 6813 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 117555840 is about 10842.3170955290. The cubic root of 117555840 is about 489.8706308478.

The spelling of 117555840 in words is "one hundred seventeen million, five hundred fifty-five thousand, eight hundred forty".