3944345 has 4 divisors (see below), whose sum is σ = 4733220. Its totient is φ = 3155472.

The previous prime is 3944329. The next prime is 3944351. The reversal of 3944345 is 5434493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5434493 = 523 ⋅10391.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 1646089 = 1516^2 + 1283^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944345 - 2⁴ = 3944329 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 394430 + ... + 394439.

It is an arithmetic number, because the mean of its divisors is an integer number (1183305).

Almost surely, 2^3944345 is an apocalyptic number.

It is an amenable number.

3944345 is a deficient number, since it is larger than the sum of its proper divisors (788875).

3944345 is an equidigital number, since it uses as much as digits as its factorization.

3944345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788874.

The product of its digits is 25920, while the sum is 32.

The square root of 3944345 is about 1986.0375122338. The cubic root of 3944345 is about 158.0004406333. Note that the first 3 decimals are identical.

The spelling of 3944345 in words is "three million, nine hundred forty-four thousand, three hundred forty-five".