408489 has 4 divisors (see below), whose sum is σ = 544656. Its totient is φ = 272324.

The previous prime is 408479. The next prime is 408491. The reversal of 408489 is 984804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 408489 - 2⁷ = 408361 is a prime.

It is an Ulam number.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 408489.

It is not an unprimeable number, because it can be changed into a prime (408469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68079 + ... + 68084.

It is an arithmetic number, because the mean of its divisors is an integer number (136164).

2⁴⁰⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

408489 is a deficient number, since it is larger than the sum of its proper divisors (136167).

408489 is a wasteful number, since it uses less digits than its factorization.

408489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136166.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 408489 is about 639.1314418803. The cubic root of 408489 is about 74.1982146363.

The spelling of 408489 in words is "four hundred eight thousand, four hundred eighty-nine".