409456 has 20 divisors (see below), whose sum is σ = 803272. Its totient is φ = 202176.

The previous prime is 409441. The next prime is 409463. The reversal of 409456 is 654904.

It is a congruent number.

It is an unprimeable number.

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, 2431 + ... + 2593.

2⁴⁰⁹⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

409456 is a deficient number, since it is larger than the sum of its proper divisors (393816).

409456 is a wasteful number, since it uses less digits than its factorization.

409456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 409456 is about 639.8874901106. The cubic root of 409456 is about 74.2567173387.

The spelling of 409456 in words is "four hundred nine thousand, four hundred fifty-six".