408439 has 4 divisors (see below), whose sum is σ = 410256. Its totient is φ = 406624.

The previous prime is 408437. The next prime is 408461. The reversal of 408439 is 934804.

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 408439 - 2¹ = 408437 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 (408431) 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 3 ways as a sum of consecutive naturals, for example, 514 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (102564).

2⁴⁰⁸⁴³⁹ is an apocalyptic number.

408439 is a deficient number, since it is larger than the sum of its proper divisors (1817).

408439 is a wasteful number, since it uses less digits than its factorization.

408439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 408439 is about 639.0923250987. The cubic root of 408439 is about 74.1951871683.

The spelling of 408439 in words is "four hundred eight thousand, four hundred thirty-nine".