117897540 has 96 divisors (see below), whose sum is σ = 353928960. Its totient is φ = 29246976.

The previous prime is 117897539. The next prime is 117897551. The reversal of 117897540 is 45798711.

It is a junction number, because it is equal to n+sod(n) for n = 117897492 and 117897501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49906 + ... + 52214.

It is an arithmetic number, because the mean of its divisors is an integer number (3686760).

Almost surely, 2^117897540 is an apocalyptic number.

117897540 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 117897540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176964480).

117897540 is an abundant number, since it is smaller than the sum of its proper divisors (236031420).

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

117897540 is a wasteful number, since it uses less digits than its factorization.

117897540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381 (or 2379 counting only the distinct ones).

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

The square root of 117897540 is about 10858.0633632338. The cubic root of 117897540 is about 490.3448079786.

The spelling of 117897540 in words is "one hundred seventeen million, eight hundred ninety-seven thousand, five hundred forty".