115978 has 8 divisors (see below), whose sum is σ = 175968. Its totient is φ = 57324.

The previous prime is 115963. The next prime is 115979. The reversal of 115978 is 879511.

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

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (115979) 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, 76 + ... + 487.

It is an arithmetic number, because the mean of its divisors is an integer number (21996).

2¹¹⁵⁹⁷⁸ is an apocalyptic number.

115978 is a deficient number, since it is larger than the sum of its proper divisors (59990).

115978 is a wasteful number, since it uses less digits than its factorization.

115978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its digits is 2520, while the sum is 31.

The square root of 115978 is about 340.5554286750. Note that the first 3 decimals coincide. The cubic root of 115978 is about 48.7669062555.

The spelling of 115978 in words is "one hundred fifteen thousand, nine hundred seventy-eight".