409668 has 24 divisors (see below), whose sum is σ = 1092672. Its totient is φ = 117024.

The previous prime is 409657. The next prime is 409691. The reversal of 409668 is 866904.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2355 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (45528).

2⁴⁰⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

409668 is an abundant number, since it is smaller than the sum of its proper divisors (683004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

409668 is a wasteful number, since it uses less digits than its factorization.

409668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4889 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 409668 is about 640.0531227953. The cubic root of 409668 is about 74.2695308505.

The spelling of 409668 in words is "four hundred nine thousand, six hundred sixty-eight".