3440840 has 48 divisors (see below), whose sum is σ = 8399700. Its totient is φ = 1267968.

The previous prime is 3440839. The next prime is 3440849. The reversal of 3440840 is 480443.

It can be written as a sum of positive squares in 6 ways, for example, as 770884 + 2669956 = 878^2 + 1634^2 .

It is not an unprimeable number, because it can be changed into a prime (3440849) 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 11 ways as a sum of consecutive naturals, for example, 6506 + ... + 7014.

Almost surely, 2^3440840 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 3440840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4199850).

3440840 is an abundant number, since it is smaller than the sum of its proper divisors (4958860).

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

3440840 is a wasteful number, since it uses less digits than its factorization.

3440840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 3440840 is about 1854.9501341006. The cubic root of 3440840 is about 150.9691324709.

The spelling of 3440840 in words is "three million, four hundred forty thousand, eight hundred forty".