8278628865 has 16 divisors (see below), whose sum is σ = 14264714688. Its totient is φ = 4075632576.

The previous prime is 8278628863. The next prime is 8278628887. The reversal of 8278628865 is 5688268728.

It is not a de Polignac number, because 8278628865 - 2¹ = 8278628863 is a prime.

It is a super-2 number, since 2×8278628865² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8278628799 and 8278628808.

It is not an unprimeable number, because it can be changed into a prime (8278628863) 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 15 ways as a sum of consecutive naturals, for example, 21227059 + ... + 21227448.

It is an arithmetic number, because the mean of its divisors is an integer number (891544668).

Almost surely, 2^8278628865 is an apocalyptic number.

It is an amenable number.

8278628865 is a deficient number, since it is larger than the sum of its proper divisors (5986085823).

8278628865 is a wasteful number, since it uses less digits than its factorization.

8278628865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42454528.

The product of its digits is 20643840, while the sum is 60.

The square root of 8278628865 is about 90986.9708529743. The cubic root of 8278628865 is about 2022.9546071630.

The spelling of 8278628865 in words is "eight billion, two hundred seventy-eight million, six hundred twenty-eight thousand, eight hundred sixty-five".