8243520 has 112 divisors (see below), whose sum is σ = 27115008. Its totient is φ = 2119680.

The previous prime is 8243513. The next prime is 8243531. The reversal of 8243520 is 253428.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29622 + ... + 29898.

Almost surely, 2^8243520 is an apocalyptic number.

8243520 is a gapful number since it is divisible by the number (80) 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 8243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13557504).

8243520 is an abundant number, since it is smaller than the sum of its proper divisors (18871488).

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

8243520 is a wasteful number, since it uses less digits than its factorization.

8243520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 8243520 is about 2871.1530784686. The cubic root of 8243520 is about 202.0090836682.

Adding to 8243520 its reverse (253428), we get a palindrome (8496948).

The spelling of 8243520 in words is "eight million, two hundred forty-three thousand, five hundred twenty".