8102220 has 96 divisors (see below), whose sum is σ = 26320896. Its totient is φ = 1824000.

The previous prime is 8102177. The next prime is 8102221. The reversal of 8102220 is 222018.

8102220 is digitally balanced in base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

8102220 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 8102220.

It is not an unprimeable number, because it can be changed into a prime (8102221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42325 + ... + 42515.

It is an arithmetic number, because the mean of its divisors is an integer number (274176).

Almost surely, 2^8102220 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 8102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13160448).

8102220 is an abundant number, since it is smaller than the sum of its proper divisors (18218676).

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

8102220 is a wasteful number, since it uses less digits than its factorization.

8102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 8102220 is about 2846.4398816768. The cubic root of 8102220 is about 200.8482307703.

Adding to 8102220 its reverse (222018), we get a palindrome (8324238).

The spelling of 8102220 in words is "eight million, one hundred two thousand, two hundred twenty".