116278389 has 16 divisors (see below), whose sum is σ = 172483200. Its totient is φ = 77420448.

The previous prime is 116278373. The next prime is 116278391. The reversal of 116278389 is 983872611.

116278389 is a `hidden beast` number, since 11 + 627 + 8 + 3 + 8 + 9 = 666.

It is not a de Polignac number, because 116278389 - 2⁴ = 116278373 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116278319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23472 + ... + 27990.

It is an arithmetic number, because the mean of its divisors is an integer number (10780200).

Almost surely, 2^116278389 is an apocalyptic number.

It is an amenable number.

116278389 is a deficient number, since it is larger than the sum of its proper divisors (56204811).

116278389 is an equidigital number, since it uses as much as digits as its factorization.

116278389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481 (or 5475 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 116278389 is about 10783.2457544099. The cubic root of 116278389 is about 488.0897289206.

The spelling of 116278389 in words is "one hundred sixteen million, two hundred seventy-eight thousand, three hundred eighty-nine".