8478667782 has 96 divisors (see below), whose sum is σ = 20206525248. Its totient is φ = 2553596928.

The previous prime is 8478667727. The next prime is 8478667783. The reversal of 8478667782 is 2877668748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8478667783) 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 47 ways as a sum of consecutive naturals, for example, 2338423 + ... + 2342045.

It is an arithmetic number, because the mean of its divisors is an integer number (210484638).

Almost surely, 2^8478667782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8478667782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10103262624).

8478667782 is an abundant number, since it is smaller than the sum of its proper divisors (11727857466).

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

8478667782 is a wasteful number, since it uses less digits than its factorization.

8478667782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854 (or 3851 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 63.

The square root of 8478667782 is about 92079.6817001449. The cubic root of 8478667782 is about 2039.1188510006.

The spelling of 8478667782 in words is "eight billion, four hundred seventy-eight million, six hundred sixty-seven thousand, seven hundred eighty-two".