409490 has 8 divisors (see below), whose sum is σ = 737100. Its totient is φ = 163792.

The previous prime is 409483. The next prime is 409499. The reversal of 409490 is 94904.

It can be written as a sum of positive squares in 2 ways, for example, as 405769 + 3721 = 637^2 + 61^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 409490.

It is not an unprimeable number, because it can be changed into a prime (409499) 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, 20465 + ... + 20484.

2⁴⁰⁹⁴⁹⁰ is an apocalyptic number.

409490 is a deficient number, since it is larger than the sum of its proper divisors (327610).

409490 is a wasteful number, since it uses less digits than its factorization.

409490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40956.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 409490 is about 639.9140567295. The cubic root of 409490 is about 74.2587726336.

The spelling of 409490 in words is "four hundred nine thousand, four hundred ninety".