3440689 has 4 divisors (see below), whose sum is σ = 3932224. Its totient is φ = 2949156.

The previous prime is 3440683. The next prime is 3440719. The reversal of 3440689 is 9860443.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9860443 = 379 ⋅26017.

It is not a de Polignac number, because 3440689 - 2⁷ = 3440561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3440683) 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 3 ways as a sum of consecutive naturals, for example, 245757 + ... + 245770.

It is an arithmetic number, because the mean of its divisors is an integer number (983056).

Almost surely, 2^3440689 is an apocalyptic number.

It is an amenable number.

3440689 is a deficient number, since it is larger than the sum of its proper divisors (491535).

3440689 is an equidigital number, since it uses as much as digits as its factorization.

3440689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491534.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 3440689 is about 1854.9094317513. The cubic root of 3440689 is about 150.9669240303.

The spelling of 3440689 in words is "three million, four hundred forty thousand, six hundred eighty-nine".