408605 has 8 divisors (see below), whose sum is σ = 497664. Its totient is φ = 322000.

The previous prime is 408563. The next prime is 408607. The reversal of 408605 is 506804.

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

It is not a de Polignac number, because 408605 - 2¹⁴ = 392221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408607) 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, 221 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (62208).

2⁴⁰⁸⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

408605 is a deficient number, since it is larger than the sum of its proper divisors (89059).

408605 is a wasteful number, since it uses less digits than its factorization.

408605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 408605 is about 639.2221835950. Note that the first 3 decimals coincide. The cubic root of 408605 is about 74.2052374107.

The spelling of 408605 in words is "four hundred eight thousand, six hundred five".