8771220 has 96 divisors (see below), whose sum is σ = 28089600. Its totient is φ = 2270592.

The previous prime is 8771219. The next prime is 8771227. The reversal of 8771220 is 221778.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8771227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19761 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (292600).

Almost surely, 2^8771220 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 8771220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14044800).

8771220 is an abundant number, since it is smaller than the sum of its proper divisors (19318380).

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

8771220 is a wasteful number, since it uses less digits than its factorization.

8771220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 8771220 is about 2961.6245541932. The cubic root of 8771220 is about 206.2307089395.

Adding to 8771220 its reverse (221778), we get a palindrome (8992998).

The spelling of 8771220 in words is "eight million, seven hundred seventy-one thousand, two hundred twenty".