3440423 has 4 divisors (see below), whose sum is σ = 3931920. Its totient is φ = 2948928.

The previous prime is 3440419. The next prime is 3440429. The reversal of 3440423 is 3240443.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3240443 = 181 ⋅17903.

It is a cyclic number.

It is not a de Polignac number, because 3440423 - 2² = 3440419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3440395 and 3440404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245738 + ... + 245751.

It is an arithmetic number, because the mean of its divisors is an integer number (982980).

Almost surely, 2^3440423 is an apocalyptic number.

3440423 is a deficient number, since it is larger than the sum of its proper divisors (491497).

3440423 is an equidigital number, since it uses as much as digits as its factorization.

3440423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491496.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 3440423 is about 1854.8377287515. The cubic root of 3440423 is about 150.9630335075.

Adding to 3440423 its sum of digits (20), we get a palindrome (3440443).

Adding to 3440423 its reverse (3240443), we get a palindrome (6680866).

The spelling of 3440423 in words is "three million, four hundred forty thousand, four hundred twenty-three".