4090439 has 8 divisors (see below), whose sum is σ = 4173312. Its totient is φ = 4008600.

The previous prime is 4090433. The next prime is 4090441. The reversal of 4090439 is 9340904.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4090439 - 2⁴ = 4090423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090433) 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 7 ways as a sum of consecutive naturals, for example, 15422 + ... + 15684.

It is an arithmetic number, because the mean of its divisors is an integer number (521664).

Almost surely, 2^4090439 is an apocalyptic number.

4090439 is a deficient number, since it is larger than the sum of its proper divisors (82873).

4090439 is a wasteful number, since it uses less digits than its factorization.

4090439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 4090439 is about 2022.4833744681. The cubic root of 4090439 is about 159.9275583521.

The spelling of 4090439 in words is "four million, ninety thousand, four hundred thirty-nine".