8424220 has 48 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 2735424.

The previous prime is 8424211. The next prime is 8424287. The reversal of 8424220 is 224248.

It is a junction number, because it is equal to n+sod(n) for n = 8424191 and 8424200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077 + ... + 4243.

It is an arithmetic number, because the mean of its divisors is an integer number (443520).

Almost surely, 2^8424220 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 8424220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10644480).

8424220 is an abundant number, since it is smaller than the sum of its proper divisors (12864740).

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

8424220 is a wasteful number, since it uses less digits than its factorization.

8424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 8424220 is about 2902.4506886423. The cubic root of 8424220 is about 203.4744578535.

Adding to 8424220 its reverse (224248), we get a palindrome (8648468).

The spelling of 8424220 in words is "eight million, four hundred twenty-four thousand, two hundred twenty".