3994439 has 4 divisors (see below), whose sum is σ = 4229424. Its totient is φ = 3759456.

The previous prime is 3994429. The next prime is 3994453. The reversal of 3994439 is 9344993.

3994439 = T₆₇₇ + T₆₇₈ + ... + T₆₉₃.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3994439 - 2⁸ = 3994183 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3994396 and 3994405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994429) 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, 117467 + ... + 117500.

It is an arithmetic number, because the mean of its divisors is an integer number (1057356).

Almost surely, 2^3994439 is an apocalyptic number.

3994439 is a deficient number, since it is larger than the sum of its proper divisors (234985).

3994439 is a wasteful number, since it uses less digits than its factorization.

3994439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234984.

The product of its digits is 104976, while the sum is 41.

The square root of 3994439 is about 1998.6092664651. The cubic root of 3994439 is about 158.6665082698. Note that the first 3 decimals are identical.

The spelling of 3994439 in words is "three million, nine hundred ninety-four thousand, four hundred thirty-nine".