8215284 has 96 divisors (see below), whose sum is σ = 25353216. Its totient is φ = 2004480.

The previous prime is 8215283. The next prime is 8215303. The reversal of 8215284 is 4825128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8215283) 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, 15447 + ... + 15969.

It is an arithmetic number, because the mean of its divisors is an integer number (264096).

Almost surely, 2^8215284 is an apocalyptic number.

8215284 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8215284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12676608).

8215284 is an abundant number, since it is smaller than the sum of its proper divisors (17137932).

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

8215284 is a wasteful number, since it uses less digits than its factorization.

8215284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 563 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 8215284 is about 2866.2316724229. The cubic root of 8215284 is about 201.7781769140.

It can be divided in two parts, 821 and 5284, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 8215284 in words is "eight million, two hundred fifteen thousand, two hundred eighty-four".