8118978 has 32 divisors (see below), whose sum is σ = 18867840. Its totient is φ = 2280960.

The previous prime is 8118973. The next prime is 8118991. The reversal of 8118978 is 8798118.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8118973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978 + ... + 4146.

It is an arithmetic number, because the mean of its divisors is an integer number (589620).

Almost surely, 2^8118978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8118978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9433920).

8118978 is an abundant number, since it is smaller than the sum of its proper divisors (10748862).

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

8118978 is a wasteful number, since it uses less digits than its factorization.

8118978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242.

The product of its digits is 32256, while the sum is 42.

The square root of 8118978 is about 2849.3820382672. The cubic root of 8118978 is about 200.9866083501.

The spelling of 8118978 in words is "eight million, one hundred eighteen thousand, nine hundred seventy-eight".