8278668728 has 32 divisors (see below), whose sum is σ = 17172155520. Its totient is φ = 3710028000.

The previous prime is 8278668683. The next prime is 8278668763.

8278668728 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656258 + ... + 668753.

It is an arithmetic number, because the mean of its divisors is an integer number (536629860).

Almost surely, 2^8278668728 is an apocalyptic number.

8278668728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8278668728 is an abundant number, since it is smaller than the sum of its proper divisors (8893486792).

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

8278668728 is a wasteful number, since it uses less digits than its factorization.

8278668728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325099 (or 1325095 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 62.

The square root of 8278668728 is about 90987.1899115474. The cubic root of 8278668728 is about 2022.9578541142.

The spelling of 8278668728 in words is "eight billion, two hundred seventy-eight million, six hundred sixty-eight thousand, seven hundred twenty-eight".