1408439 has 4 divisors (see below), whose sum is σ = 1411656. Its totient is φ = 1405224.

The previous prime is 1408417. The next prime is 1408453. The reversal of 1408439 is 9348041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1408439 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 (1408409) 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, 824 + ... + 1869.

It is an arithmetic number, because the mean of its divisors is an integer number (352914).

2^1408439 is an apocalyptic number.

1408439 is a deficient number, since it is larger than the sum of its proper divisors (3217).

1408439 is an equidigital number, since it uses as much as digits as its factorization.

1408439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1408439 is about 1186.7767271058. The cubic root of 1408439 is about 112.0932206452.

The spelling of 1408439 in words is "one million, four hundred eight thousand, four hundred thirty-nine".