117686540 has 24 divisors (see below), whose sum is σ = 255115392. Its totient is φ = 45555840.

The previous prime is 117686539. The next prime is 117686549. The reversal of 117686540 is 45686711.

It is a junction number, because it is equal to n+sod(n) for n = 117686494 and 117686503.

It is not an unprimeable number, because it can be changed into a prime (117686549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94289 + ... + 95528.

It is an arithmetic number, because the mean of its divisors is an integer number (10629808).

Almost surely, 2^117686540 is an apocalyptic number.

117686540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117686540 is an abundant number, since it is smaller than the sum of its proper divisors (137428852).

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

117686540 is a wasteful number, since it uses less digits than its factorization.

117686540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189857 (or 189855 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 117686540 is about 10848.3427305741. The cubic root of 117686540 is about 490.0521116311.

The spelling of 117686540 in words is "one hundred seventeen million, six hundred eighty-six thousand, five hundred forty".