8971220 has 12 divisors (see below), whose sum is σ = 18839604. Its totient is φ = 3588480.

The previous prime is 8971217. The next prime is 8971229. The reversal of 8971220 is 221798.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5541316 + 3429904 = 2354^2 + 1852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8971229) 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 3 ways as a sum of consecutive naturals, for example, 224261 + ... + 224300.

It is an arithmetic number, because the mean of its divisors is an integer number (1569967).

Almost surely, 2^8971220 is an apocalyptic number.

It is an amenable number.

8971220 is an abundant number, since it is smaller than the sum of its proper divisors (9868384).

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

8971220 is a wasteful number, since it uses less digits than its factorization.

8971220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448570 (or 448568 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 8971220 is about 2995.1994925213. The cubic root of 8971220 is about 207.7864240182.

It can be divided in two parts, 89 and 71220, that multiplied together give a triangular number (6338580 = T₃₅₆₀).

The spelling of 8971220 in words is "eight million, nine hundred seventy-one thousand, two hundred twenty".