8278505828 has 24 divisors (see below), whose sum is σ = 15120893760. Its totient is φ = 3958336800.

The previous prime is 8278505821. The next prime is 8278505839. The reversal of 8278505828 is 8285058728.

It is a self number, because there is not a number n which added to its sum of digits gives 8278505828.

It is not an unprimeable number, because it can be changed into a prime (8278505821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512678 + ... + 528578.

It is an arithmetic number, because the mean of its divisors is an integer number (630037240).

Almost surely, 2^8278505828 is an apocalyptic number.

It is an amenable number.

8278505828 is a deficient number, since it is larger than the sum of its proper divisors (6842387932).

8278505828 is a wasteful number, since it uses less digits than its factorization.

8278505828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21587 (or 21585 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 53.

The square root of 8278505828 is about 90986.2947261839. The cubic root of 8278505828 is about 2022.9445853948.

The spelling of 8278505828 in words is "eight billion, two hundred seventy-eight million, five hundred five thousand, eight hundred twenty-eight".