409478 has 8 divisors (see below), whose sum is σ = 625968. Its totient is φ = 200824.

The previous prime is 409477. The next prime is 409483. The reversal of 409478 is 874904.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409471) 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, 1826 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (78246).

2⁴⁰⁹⁴⁷⁸ is an apocalyptic number.

409478 is a deficient number, since it is larger than the sum of its proper divisors (216490).

409478 is a wasteful number, since it uses less digits than its factorization.

409478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 409478 is about 639.9046804017. The cubic root of 409478 is about 74.2580472484.

The spelling of 409478 in words is "four hundred nine thousand, four hundred seventy-eight".