404185085 has 8 divisors (see below), whose sum is σ = 492973656. Its totient is φ = 318047040.

The previous prime is 404185073. The next prime is 404185087. The reversal of 404185085 is 580581404.

It can be written as a sum of positive squares in 4 ways, for example, as 39413284 + 364771801 = 6278^2 + 19099^2 .

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

It is not a de Polignac number, because 404185085 - 2⁸ = 404184829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404185087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662294 + ... + 662903.

It is an arithmetic number, because the mean of its divisors is an integer number (61621707).

Almost surely, 2^404185085 is an apocalyptic number.

It is an amenable number.

404185085 is a deficient number, since it is larger than the sum of its proper divisors (88788571).

404185085 is a wasteful number, since it uses less digits than its factorization.

404185085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325263.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 404185085 is about 20104.3548764938. The cubic root of 404185085 is about 739.3670537345.

The spelling of 404185085 in words is "four hundred four million, one hundred eighty-five thousand, eighty-five".