3247440 has 80 divisors (see below), whose sum is σ = 11511168. Its totient is φ = 741888.

The previous prime is 3247429. The next prime is 3247451. The reversal of 3247440 is 447423.

3247440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3247429) and next prime (3247451).

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3247440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714 + ... + 2646.

Almost surely, 2^3247440 is an apocalyptic number.

3247440 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 3247440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5755584).

3247440 is an abundant number, since it is smaller than the sum of its proper divisors (8263728).

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

3247440 is a wasteful number, since it uses less digits than its factorization.

3247440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 3247440 is about 1802.0654816071. The cubic root of 3247440 is about 148.0859009481.

The spelling of 3247440 in words is "three million, two hundred forty-seven thousand, four hundred forty".