3245440 has 64 divisors (see below), whose sum is σ = 8482320. Its totient is φ = 1177600.

The previous prime is 3245423. The next prime is 3245441. The reversal of 3245440 is 445423.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a d-powerful number, because it can be written as 3¹³ + 2¹⁹ + 4³ + 5⁷ + 4³ + 4¹⁰ + 0 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3245441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6810 + ... + 7270.

Almost surely, 2^3245440 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 3245440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4241160).

3245440 is an abundant number, since it is smaller than the sum of its proper divisors (5236880).

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

3245440 is a wasteful number, since it uses less digits than its factorization.

3245440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 3245440 is about 1801.5104773495. The cubic root of 3245440 is about 148.0554941637.

The spelling of 3245440 in words is "three million, two hundred forty-five thousand, four hundred forty".