3243520 has 80 divisors (see below), whose sum is σ = 8936928. Its totient is φ = 1105920.

The previous prime is 3243511. The next prime is 3243521. The reversal of 3243520 is 253423.

3243520 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3243521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17830 + ... + 18010.

Almost surely, 2^3243520 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 3243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4468464).

3243520 is an abundant number, since it is smaller than the sum of its proper divisors (5693408).

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

3243520 is an equidigital number, since it uses as much as digits as its factorization.

3243520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 3243520 is about 1800.9775123527. The cubic root of 3243520 is about 148.0262918959.

Adding to 3243520 its reverse (253423), we get a palindrome (3496943).

It can be divided in two parts, 324 and 3520, that added together give a square (3844 = 62²).

The spelling of 3243520 in words is "three million, two hundred forty-three thousand, five hundred twenty".