8220920 has 64 divisors (see below), whose sum is σ = 20196000. Its totient is φ = 2999808.

The previous prime is 8220899. The next prime is 8220923. The reversal of 8220920 is 290228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21854 + ... + 22226.

Almost surely, 2^8220920 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 8220920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10098000).

8220920 is an abundant number, since it is smaller than the sum of its proper divisors (11975080).

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

8220920 is a wasteful number, since it uses less digits than its factorization.

8220920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 8220920 is about 2867.2146763017. The cubic root of 8220920 is about 201.8243088896.

The spelling of 8220920 in words is "eight million, two hundred twenty thousand, nine hundred twenty".