396805 has 8 divisors (see below), whose sum is σ = 484344. Its totient is φ = 312000.

The previous prime is 396733. The next prime is 396833. The reversal of 396805 is 508693.

It can be written as a sum of positive squares in 4 ways, for example, as 47524 + 349281 = 218^2 + 591^2 .

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

It is not a de Polignac number, because 396805 - 2⁹ = 396293 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 346 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (60543).

2³⁹⁶⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

396805 is a deficient number, since it is larger than the sum of its proper divisors (87539).

396805 is a wasteful number, since it uses less digits than its factorization.

396805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 396805 is about 629.9245986624. The cubic root of 396805 is about 73.4839306502.

The spelling of 396805 in words is "three hundred ninety-six thousand, eight hundred five".