8109978 has 8 divisors (see below), whose sum is σ = 16219968. Its totient is φ = 2703324.

The previous prime is 8109973. The next prime is 8110009. The reversal of 8109978 is 8799018.

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

8109978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (8109971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675826 + ... + 675837.

It is an arithmetic number, because the mean of its divisors is an integer number (2027496).

Almost surely, 2^8109978 is an apocalyptic number.

8109978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8109978 is a wasteful number, since it uses less digits than its factorization.

8109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351668.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 8109978 is about 2847.8023105546. The cubic root of 8109978 is about 200.9123154085.

The spelling of 8109978 in words is "eight million, one hundred nine thousand, nine hundred seventy-eight".