8465220 has 72 divisors (see below), whose sum is σ = 25945920. Its totient is φ = 2233920.

The previous prime is 8465209. The next prime is 8465221. The reversal of 8465220 is 225648.

8465220 is a `hidden beast` number, since 8 + 4 + 652 + 2 + 0 = 666.

It is a super-4 number, since 4×8465220⁴ (a number of 29 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (8465221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23401 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (360360).

Almost surely, 2^8465220 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 8465220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12972960).

8465220 is an abundant number, since it is smaller than the sum of its proper divisors (17480700).

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

8465220 is a wasteful number, since it uses less digits than its factorization.

8465220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 8465220 is about 2909.5051125578. The cubic root of 8465220 is about 203.8040217075.

The spelling of 8465220 in words is "eight million, four hundred sixty-five thousand, two hundred twenty".