409394 has 8 divisors (see below), whose sum is σ = 650268. Its totient is φ = 192640.

The previous prime is 409391. The next prime is 409397. The reversal of 409394 is 493904.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (409391) and next prime (409397).

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 18769 = 625^2 + 137^2 .

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

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (409391) 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, 5987 + ... + 6054.

2⁴⁰⁹³⁹⁴ is an apocalyptic number.

409394 is a deficient number, since it is larger than the sum of its proper divisors (240874).

409394 is a wasteful number, since it uses less digits than its factorization.

409394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12060.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 409394 is about 639.8390422598. The cubic root of 409394 is about 74.2529691550.

The spelling of 409394 in words is "four hundred nine thousand, three hundred ninety-four".