8215320 has 64 divisors (see below), whose sum is σ = 24837120. Its totient is φ = 2173824.

The previous prime is 8215313. The next prime is 8215327. The reversal of 8215320 is 235128.

It is an interprime number because it is at equal distance from previous prime (8215313) and next prime (8215327).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8215327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26607 + ... + 26913.

It is an arithmetic number, because the mean of its divisors is an integer number (388080).

Almost surely, 2^8215320 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 8215320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12418560).

8215320 is an abundant number, since it is smaller than the sum of its proper divisors (16621800).

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

8215320 is a wasteful number, since it uses less digits than its factorization.

8215320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 8215320 is about 2866.2379524387. The cubic root of 8215320 is about 201.7784716493.

The spelling of 8215320 in words is "eight million, two hundred fifteen thousand, three hundred twenty".