8512820 has 12 divisors (see below), whose sum is σ = 17876964. Its totient is φ = 3405120.

The previous prime is 8512799. The next prime is 8512831. The reversal of 8512820 is 282158.

It can be written as a sum of positive squares in 2 ways, for example, as 4343056 + 4169764 = 2084^2 + 2042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8512820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212801 + ... + 212840.

It is an arithmetic number, because the mean of its divisors is an integer number (1489747).

Almost surely, 2^8512820 is an apocalyptic number.

It is an amenable number.

8512820 is an abundant number, since it is smaller than the sum of its proper divisors (9364144).

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

8512820 is a wasteful number, since it uses less digits than its factorization.

8512820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425650 (or 425648 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 8512820 is about 2917.6737309028. The cubic root of 8512820 is about 204.1853051613.

Adding to 8512820 its reverse (282158), we get a palindrome (8794978).

The spelling of 8512820 in words is "eight million, five hundred twelve thousand, eight hundred twenty".