404785 has 8 divisors (see below), whose sum is σ = 492840. Its totient is φ = 319104.

The previous prime is 404783. The next prime is 404819. The reversal of 404785 is 587404.

It can be written as a sum of positive squares in 4 ways, for example, as 289 + 404496 = 17^2 + 636^2 .

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 404785 - 2¹ = 404783 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (404783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190 + ... + 919.

It is an arithmetic number, because the mean of its divisors is an integer number (61605).

2⁴⁰⁴⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

404785 is a deficient number, since it is larger than the sum of its proper divisors (88055).

404785 is a wasteful number, since it uses less digits than its factorization.

404785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 404785 is about 636.2271606903. The cubic root of 404785 is about 73.9732676756.

The spelling of 404785 in words is "four hundred four thousand, seven hundred eighty-five".