3440340 has 96 divisors (see below), whose sum is σ = 11208960. Its totient is φ = 874368.

The previous prime is 3440323. The next prime is 3440347. The reversal of 3440340 is 430443.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12282 + ... + 12558.

It is an arithmetic number, because the mean of its divisors is an integer number (116760).

Almost surely, 2^3440340 is an apocalyptic number.

3440340 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 3440340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5604480).

3440340 is an abundant number, since it is smaller than the sum of its proper divisors (7768620).

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

3440340 is a wasteful number, since it uses less digits than its factorization.

3440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 3440340 is about 1854.8153546917. The cubic root of 3440340 is about 150.9618195064.

Adding to 3440340 its reverse (430443), we get a palindrome (3870783).

It can be divided in two parts, 34403 and 40, that added together give a palindrome (34443).

The spelling of 3440340 in words is "three million, four hundred forty thousand, three hundred forty".