3530240 has 80 divisors (see below), whose sum is σ = 9722592. Its totient is φ = 1204224.

The previous prime is 3530231. The next prime is 3530243. The reversal of 3530240 is 420353.

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 (3530243) 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, 17822 + ... + 18018.

Almost surely, 2^3530240 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 3530240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4861296).

3530240 is an abundant number, since it is smaller than the sum of its proper divisors (6192352).

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

3530240 is an equidigital number, since it uses as much as digits as its factorization.

3530240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 3530240 is about 1878.8932912755. The cubic root of 3530240 is about 152.2654640818.

Adding to 3530240 its reverse (420353), we get a palindrome (3950593).

The spelling of 3530240 in words is "three million, five hundred thirty thousand, two hundred forty".