8280820 has 24 divisors (see below), whose sum is σ = 17474184. Its totient is φ = 3296256.

The previous prime is 8280817. The next prime is 8280821. The reversal of 8280820 is 280828.

It can be written as a sum of positive squares in 4 ways, for example, as 226576 + 8054244 = 476^2 + 2838^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8280821) 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, 3772 + ... + 5548.

It is an arithmetic number, because the mean of its divisors is an integer number (728091).

Almost surely, 2^8280820 is an apocalyptic number.

It is an amenable number.

8280820 is an abundant number, since it is smaller than the sum of its proper divisors (9193364).

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

8280820 is a wasteful number, since it uses less digits than its factorization.

8280820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 8280820 is about 2877.6413953097. The cubic root of 8280820 is about 202.3133065686.

It can be divided in two parts, 82808 and 20, that added together give a palindrome (82828).

The spelling of 8280820 in words is "eight million, two hundred eighty thousand, eight hundred twenty".