409426 has 8 divisors (see below), whose sum is σ = 629244. Its totient is φ = 199680.

The previous prime is 409397. The next prime is 409429. The reversal of 409426 is 624904.

It can be written as a sum of positive squares in 2 ways, for example, as 358801 + 50625 = 599^2 + 225^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 409426.

It is not an unprimeable number, because it can be changed into a prime (409429) by changing a digit.

409426 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 2415 + ... + 2578.

2⁴⁰⁹⁴²⁶ is an apocalyptic number.

409426 is a deficient number, since it is larger than the sum of its proper divisors (219818).

409426 is a wasteful number, since it uses less digits than its factorization.

409426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 409426 is about 639.8640480602. The cubic root of 409426 is about 74.2549037487.

The spelling of 409426 in words is "four hundred nine thousand, four hundred twenty-six".