8685220 has 12 divisors (see below), whose sum is σ = 18239004. Its totient is φ = 3474080.

The previous prime is 8685211. The next prime is 8685227. The reversal of 8685220 is 225868.

It can be written as a sum of positive squares in 2 ways, for example, as 4596736 + 4088484 = 2144^2 + 2022^2 .

It is not an unprimeable number, because it can be changed into a prime (8685227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217111 + ... + 217150.

It is an arithmetic number, because the mean of its divisors is an integer number (1519917).

Almost surely, 2^8685220 is an apocalyptic number.

It is an amenable number.

8685220 is an abundant number, since it is smaller than the sum of its proper divisors (9553784).

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

8685220 is a wasteful number, since it uses less digits than its factorization.

8685220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434270 (or 434268 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 8685220 is about 2947.0697311058. The cubic root of 8685220 is about 205.5544774989.

The spelling of 8685220 in words is "eight million, six hundred eighty-five thousand, two hundred twenty".