8278945812 has 18 divisors (see below), whose sum is σ = 20927335338. Its totient is φ = 2759648592.

The previous prime is 8278945783. The next prime is 8278945817. The reversal of 8278945812 is 2185498728.

It can be written as a sum of positive squares in only one way, i.e., 6405441156 + 1873504656 = 80034^2 + 43284^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) 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 (8278945817) 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 5 ways as a sum of consecutive naturals, for example, 114985323 + ... + 114985394.

It is an arithmetic number, because the mean of its divisors is an integer number (1162629741).

Almost surely, 2^8278945812 is an apocalyptic number.

It is an amenable number.

8278945812 is an abundant number, since it is smaller than the sum of its proper divisors (12648389526).

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

8278945812 is a wasteful number, since it uses less digits than its factorization.

8278945812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229970727 (or 229970722 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 8278945812 is about 90988.7125527117. The cubic root of 8278945812 is about 2022.9804230810.

The spelling of 8278945812 in words is "eight billion, two hundred seventy-eight million, nine hundred forty-five thousand, eight hundred twelve".