409678 has 8 divisors (see below), whose sum is σ = 646920. Its totient is φ = 194040.

The previous prime is 409657. The next prime is 409691. The reversal of 409678 is 876904.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5353 + ... + 5428.

It is an arithmetic number, because the mean of its divisors is an integer number (80865).

2⁴⁰⁹⁶⁷⁸ is an apocalyptic number.

409678 is a deficient number, since it is larger than the sum of its proper divisors (237242).

409678 is a wasteful number, since it uses less digits than its factorization.

409678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10802.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 409678 is about 640.0609345992. The cubic root of 409678 is about 74.2701351523.

The spelling of 409678 in words is "four hundred nine thousand, six hundred seventy-eight".