396809785 has 8 divisors (see below), whose sum is σ = 476588160. Its totient is φ = 317170224.

The previous prime is 396809773. The next prime is 396809857. The reversal of 396809785 is 587908693.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 396809785 - 2⁵ = 396809753 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28305 + ... + 39934.

It is an arithmetic number, because the mean of its divisors is an integer number (59573520).

Almost surely, 2^396809785 is an apocalyptic number.

It is an amenable number.

396809785 is a deficient number, since it is larger than the sum of its proper divisors (79778375).

396809785 is a wasteful number, since it uses less digits than its factorization.

396809785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69407.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 396809785 is about 19920.0849646782. The cubic root of 396809785 is about 734.8422602554.

The spelling of 396809785 in words is "three hundred ninety-six million, eight hundred nine thousand, seven hundred eighty-five".