408309 has 8 divisors (see below), whose sum is σ = 593952. Its totient is φ = 247440.

The previous prime is 408283. The next prime is 408311. The reversal of 408309 is 903804.

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

It is not a de Polignac number, because 408309 - 2¹² = 404213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6154 + ... + 6219.

It is an arithmetic number, because the mean of its divisors is an integer number (74244).

2⁴⁰⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

408309 is a deficient number, since it is larger than the sum of its proper divisors (185643).

408309 is a wasteful number, since it uses less digits than its factorization.

408309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12387.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 408309 is about 638.9906102597. The cubic root of 408309 is about 74.1873145951.

It can be divided in two parts, 408 and 309, that added together give a palindrome (717).

The spelling of 408309 in words is "four hundred eight thousand, three hundred nine".