3504240 has 120 divisors (see below), whose sum is σ = 12225408. Its totient is φ = 898560.

The previous prime is 3504239. The next prime is 3504251. The reversal of 3504240 is 424053.

It is a happy number.

3504240 is digitally balanced in base 2, 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 (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 22242 + ... + 22398.

Almost surely, 2^3504240 is an apocalyptic number.

3504240 is a gapful number since it is divisible by the number (30) 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 3504240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6112704).

3504240 is an abundant number, since it is smaller than the sum of its proper divisors (8721168).

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

3504240 is a wasteful number, since it uses less digits than its factorization.

3504240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 3504240 is about 1871.9615380664. The cubic root of 3504240 is about 151.8907340301.

Adding to 3504240 its reverse (424053), we get a palindrome (3928293).

The spelling of 3504240 in words is "three million, five hundred four thousand, two hundred forty".