8220620 has 12 divisors (see below), whose sum is σ = 17263344. Its totient is φ = 3288240.

The previous prime is 8220581. The next prime is 8220631. The reversal of 8220620 is 260228.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 411031 = 8220620 / (8 + 2 + 2 + 0 + 6 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 8220592 and 8220601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205496 + ... + 205535.

It is an arithmetic number, because the mean of its divisors is an integer number (1438612).

Almost surely, 2^8220620 is an apocalyptic number.

It is an amenable number.

8220620 is an abundant number, since it is smaller than the sum of its proper divisors (9042724).

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

8220620 is a wasteful number, since it uses less digits than its factorization.

8220620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411040 (or 411038 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 8220620 is about 2867.1623602440. The cubic root of 8220620 is about 201.8218538510.

Adding to 8220620 its reverse (260228), we get a palindrome (8480848).

It can be divided in two parts, 82 and 20620, that added together give a palindrome (20702).

The spelling of 8220620 in words is "eight million, two hundred twenty thousand, six hundred twenty".