117890 has 8 divisors (see below), whose sum is σ = 212220. Its totient is φ = 47152.

The previous prime is 117889. The next prime is 117899. The reversal of 117890 is 98711.

It can be written as a sum of positive squares in 2 ways, for example, as 101761 + 16129 = 319^2 + 127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (117899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5885 + ... + 5904.

2¹¹⁷⁸⁹⁰ is an apocalyptic number.

117890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117890 is a deficient number, since it is larger than the sum of its proper divisors (94330).

117890 is a wasteful number, since it uses less digits than its factorization.

117890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11796.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 117890 is about 343.3511322247. The cubic root of 117890 is about 49.0334354612.

The spelling of 117890 in words is "one hundred seventeen thousand, eight hundred ninety".