8612820 has 72 divisors (see below), whose sum is σ = 26601120. Its totient is φ = 2255040.

The previous prime is 8612801. The next prime is 8612831. The reversal of 8612820 is 282168.

8612820 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10215 + ... + 11025.

It is an arithmetic number, because the mean of its divisors is an integer number (369460).

Almost surely, 2^8612820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8612820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13300560).

8612820 is an abundant number, since it is smaller than the sum of its proper divisors (17988300).

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

8612820 is a wasteful number, since it uses less digits than its factorization.

8612820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 8612820 is about 2934.7606375989. The cubic root of 8612820 is about 204.9817156010.

Adding to 8612820 its reverse (282168), we get a palindrome (8894988).

The spelling of 8612820 in words is "eight million, six hundred twelve thousand, eight hundred twenty".