3251440 has 40 divisors (see below), whose sum is σ = 7655760. Its totient is φ = 1284096.

The previous prime is 3251411. The next prime is 3251447. The reversal of 3251440 is 441523.

3251440 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 (40).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3251447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7551 + ... + 7969.

It is an arithmetic number, because the mean of its divisors is an integer number (191394).

Almost surely, 2^3251440 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 3251440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3827880).

3251440 is an abundant number, since it is smaller than the sum of its proper divisors (4404320).

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

3251440 is a wasteful number, since it uses less digits than its factorization.

3251440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 3251440 is about 1803.1749776436. The cubic root of 3251440 is about 148.1466770842.

Adding to 3251440 its reverse (441523), we get a palindrome (3692963).

The spelling of 3251440 in words is "three million, two hundred fifty-one thousand, four hundred forty".