117678 has 16 divisors (see below), whose sum is σ = 256896. Its totient is φ = 35640.

The previous prime is 117673. The next prime is 117679. The reversal of 117678 is 876711.

117678 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a super-2 number, since 2×117678² = 27696223368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826 + ... + 957.

It is an arithmetic number, because the mean of its divisors is an integer number (16056).

2¹¹⁷⁶⁷⁸ is an apocalyptic number.

117678 is an abundant number, since it is smaller than the sum of its proper divisors (139218).

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

117678 is a wasteful number, since it uses less digits than its factorization.

117678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its digits is 2352, while the sum is 30.

The square root of 117678 is about 343.0422714477. The cubic root of 117678 is about 49.0040257695.

The spelling of 117678 in words is "one hundred seventeen thousand, six hundred seventy-eight".