8106820 has 12 divisors (see below), whose sum is σ = 17024364. Its totient is φ = 3242720.

The previous prime is 8106817. The next prime is 8106871. The reversal of 8106820 is 286018.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 2114116 = 2448^2 + 1454^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202651 + ... + 202690.

It is an arithmetic number, because the mean of its divisors is an integer number (1418697).

Almost surely, 2^8106820 is an apocalyptic number.

It is an amenable number.

8106820 is an abundant number, since it is smaller than the sum of its proper divisors (8917544).

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

8106820 is a wasteful number, since it uses less digits than its factorization.

8106820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405350 (or 405348 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 8106820 is about 2847.2477939231. The cubic root of 8106820 is about 200.8862338143.

The spelling of 8106820 in words is "eight million, one hundred six thousand, eight hundred twenty".